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struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.
Link: https://lore.kernel.org/r/20250303-gpiochip-set-conversion-v1-1-1d5cceeebf8b@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
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Remove the put_device() call on dmadev. The driver sets the field
without getting a reference, so it shouldn't put a reference either.
The dmadev field points to the regular USB device for which DRM
maintains a reference internally. Hence dmadev will not become dangling
during the DRM device's lifetime.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 0670c2f56e45 ("drm/tiny: add driver for Apple Touch Bars in x86 Macs")
Cc: Aditya Garg <gargaditya08@live.com>
Cc: Aun-Ali Zaidi <admin@kodeit.net>
Cc: dri-devel@lists.freedesktop.org
Acked-by: Aditya Garg <gargaditya08@live.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250307083702.142675-1-tzimmermann@suse.de
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The intel_context_flush_present() is called in places where either the
scalable mode is disabled, or scalable mode is enabled but all PASID
entries are known to be non-present. In these cases, the flush_domains
path within intel_context_flush_present() will never execute. This dead
code is therefore removed.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Link: https://lore.kernel.org/r/20250228092631.3425464-7-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Update PRI enablement to use the new method, similar to the amd iommu
driver. Enable PRI in the device probe path and disable it when the device
is released. PRI is enabled throughout the device's iommu lifecycle. The
infrastructure for the iommu subsystem to handle iopf requests is created
during iopf enablement and released during iopf disablement. All invalid
page requests from the device are automatically handled by the iommu
subsystem if iopf is not enabled. Add iopf_refcount to track the iopf
enablement.
Convert the return type of intel_iommu_disable_iopf() to void, as there
is no way to handle a failure when disabling this feature. Make
intel_iommu_enable/disable_iopf() helpers global, as they will be used
beyond the current file in the subsequent patch.
The iopf_refcount is not protected by any lock. This is acceptable, as
there is no concurrent access to it in the current code. The following
patch will address this by moving it to the domain attach/detach paths,
which are protected by the iommu group mutex.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Link: https://lore.kernel.org/r/20250228092631.3425464-6-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Device ATS is currently enabled when a domain is attached to the device
and disabled when the domain is detached. This creates a limitation:
when the IOMMU is operating in scalable mode and IOPF is enabled, the
device's domain cannot be changed.
The previous code enables ATS when a domain is set to a device's RID and
disables it during RID domain switch. So, if a PASID is set with a
domain requiring PRI, ATS should remain enabled until the domain is
removed. During the PASID domain's lifecycle, if the RID's domain
changes, PRI will be disrupted because it depends on ATS, which is
disabled when the blocking domain is set for the device's RID.
Remove this limitation by moving ATS enablement to the device probe path.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Link: https://lore.kernel.org/r/20250228092631.3425464-5-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Attach of a SVA domain should fail if SVA is not supported, move the check
for SVA support out of IOMMU_DEV_FEAT_SVA and into attach.
Also check when allocating a SVA domain to match other drivers.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Link: https://lore.kernel.org/r/20250228092631.3425464-3-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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If all the inlines are unwound virt_to_dma_pfn() is simply:
return page_to_pfn(virt_to_page(p)) << (PAGE_SHIFT - VTD_PAGE_SHIFT);
Which can be re-arranged to:
(page_to_pfn(virt_to_page(p)) << PAGE_SHIFT) >> VTD_PAGE_SHIFT
The only caller is:
((uint64_t)virt_to_dma_pfn(tmp_page) << VTD_PAGE_SHIFT)
re-arranged to:
((page_to_pfn(virt_to_page(tmp_page)) << PAGE_SHIFT) >> VTD_PAGE_SHIFT)
<< VTD_PAGE_SHIFT
Which simplifies to:
page_to_pfn(virt_to_page(tmp_page)) << PAGE_SHIFT
That is the same as virt_to_phys(tmp_page), so just remove all of this.
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/8-v3-e797f4dc6918+93057-iommu_pages_jgg@nvidia.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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We found that executing the command ./a.out &;reboot -f (where a.out is a
program that only executes a while(1) infinite loop) can probabilistically
cause the system to hang in the intel_iommu_shutdown() function, rendering
it unresponsive. Through analysis, we identified that the factors
contributing to this issue are as follows:
1. The reboot -f command does not prompt the kernel to notify the
application layer to perform cleanup actions, allowing the application to
continue running.
2. When the kernel reaches the intel_iommu_shutdown() function, only the
BSP (Bootstrap Processor) CPU is operational in the system.
3. During the execution of intel_iommu_shutdown(), the function down_write
(&dmar_global_lock) causes the process to sleep and be scheduled out.
4. At this point, though the processor's interrupt flag is not cleared,
allowing interrupts to be accepted. However, only legacy devices and NMI
(Non-Maskable Interrupt) interrupts could come in, as other interrupts
routing have already been disabled. If no legacy or NMI interrupts occur
at this stage, the scheduler will not be able to run.
5. If the application got scheduled at this time is executing a while(1)-
type loop, it will be unable to be preempted, leading to an infinite loop
and causing the system to become unresponsive.
To resolve this issue, the intel_iommu_shutdown() function should not
execute down_write(), which can potentially cause the process to be
scheduled out. Furthermore, since only the BSP is running during the later
stages of the reboot, there is no need for protection against parallel
access to the DMAR (DMA Remapping) unit. Therefore, the following lines
could be removed:
down_write(&dmar_global_lock);
up_write(&dmar_global_lock);
After testing, the issue has been resolved.
Fixes: 6c3a44ed3c55 ("iommu/vt-d: Turn off translations at shutdown")
Co-developed-by: Ethan Zhao <haifeng.zhao@linux.intel.com>
Signed-off-by: Ethan Zhao <haifeng.zhao@linux.intel.com>
Signed-off-by: Yunhui Cui <cuiyunhui@bytedance.com>
Link: https://lore.kernel.org/r/20250303062421.17929-1-cuiyunhui@bytedance.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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This is needed by ISP, which has DART0 with bypass and DART1/2 without.
Signed-off-by: Hector Martin <marcan@marcan.st>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/20250307-isp-dart-v3-2-684fe4489591@gmail.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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ISP needs this.
Signed-off-by: Hector Martin <marcan@marcan.st>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/20250307-isp-dart-v3-1-684fe4489591@gmail.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Consolidate protection domain free code inside amd_iommu_domain_free()
and remove protection_domain_free() function.
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20250227162320.5805-8-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Remove unused forward declaration.
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20250227162320.5805-7-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Move function declaration inside AMD_IOMMU_H defination.
Fixes: fd5dff9de4be ("iommu/amd: Modify set_dte_entry() to use 256-bit DTE helpers")
Fixes: 457da5764668 ("iommu/amd: Lock DTE before updating the entry with WRITE_ONCE()")
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20250227162320.5805-6-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Remove outdated comment.
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20250227162320.5805-5-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Return -ENOMEM if v2_alloc_pte() fails to allocate memory.
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20250227162320.5805-4-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Remove 'amd_iommu_aperture_order' as its not used since commit d9cfed925448.
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20250227162320.5805-3-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Useful for debugging ILLEGAL_DEV_TABLE_ENTRY events as some of the
DTE settings depends on Control register settings.
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20250227162320.5805-2-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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This reverts commit ac9a5d522bb80be50ea84965699e1c8257d745ce.
iommu_dma_init_domain() is now only called under the group mutex, as it
should be given that that the default domain belongs to the group, so
the additional internal locking is no longer needed.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/a943d4c198e6a1fffe998337d577dc3aa7f660a9.1740585469.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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Some register groups reserve a byte at the end of their continuous
address space. Depending on the variant of silicon, this field may
share the same memory space as the lower byte of the system status
register (0x10).
In these cases, caching the reserved byte and writing it later may
effectively reset the device depending on what happened in between
the read and write operations.
Solve this problem by avoiding any access to this last byte within
offending register groups. This method replaces a workaround which
attempted to write the reserved byte with up-to-date contents, but
left a small window in which updates by the device could have been
clobbered.
Now that the driver does not touch these reserved bytes, the order
in which the device's registers are written no longer matters, and
they can be written in their natural order. The new method is also
much more generic, and can be more easily extended to new variants
of silicon with different register maps.
As part of this change, the register read and write functions must
be gently updated to support byte access instead of word access.
Fixes: 2e70ef525b73 ("Input: iqs7222 - acknowledge reset before writing registers")
Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Link: https://lore.kernel.org/r/Z85Alw+d9EHKXx2e@nixie71
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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This functionally brings tegra186 in line with tegra210 and tegra194,
sharing a cpufreq policy between all cores in a cluster.
Reviewed-by: Sumit Gupta <sumitg@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
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When a Hyper-V framebuffer device is unbind, hyperv_fb driver tries to
release the framebuffer forcefully. If this framebuffer is in use it
produce the following WARN and hence this framebuffer is never released.
[ 44.111220] WARNING: CPU: 35 PID: 1882 at drivers/video/fbdev/core/fb_info.c:70 framebuffer_release+0x2c/0x40
< snip >
[ 44.111289] Call Trace:
[ 44.111290] <TASK>
[ 44.111291] ? show_regs+0x6c/0x80
[ 44.111295] ? __warn+0x8d/0x150
[ 44.111298] ? framebuffer_release+0x2c/0x40
[ 44.111300] ? report_bug+0x182/0x1b0
[ 44.111303] ? handle_bug+0x6e/0xb0
[ 44.111306] ? exc_invalid_op+0x18/0x80
[ 44.111308] ? asm_exc_invalid_op+0x1b/0x20
[ 44.111311] ? framebuffer_release+0x2c/0x40
[ 44.111313] ? hvfb_remove+0x86/0xa0 [hyperv_fb]
[ 44.111315] vmbus_remove+0x24/0x40 [hv_vmbus]
[ 44.111323] device_remove+0x40/0x80
[ 44.111325] device_release_driver_internal+0x20b/0x270
[ 44.111327] ? bus_find_device+0xb3/0xf0
Fix this by moving the release of framebuffer and assosiated memory
to fb_ops.fb_destroy function, so that framebuffer framework handles
it gracefully.
While we fix this, also replace manual registrations/unregistration of
framebuffer with devm_register_framebuffer.
Fixes: 68a2d20b79b1 ("drivers/video: add Hyper-V Synthetic Video Frame Buffer Driver")
Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Tested-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1740845791-19977-3-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <1740845791-19977-3-git-send-email-ssengar@linux.microsoft.com>
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The device object required in 'hvfb_release_phymem' function
for 'dma_free_coherent' can also be obtained from the 'info'
pointer, making 'hdev' parameter in 'hvfb_putmem' redundant.
Remove the unnecessary 'hdev' argument from 'hvfb_putmem'.
Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Tested-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1740845791-19977-2-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <1740845791-19977-2-git-send-email-ssengar@linux.microsoft.com>
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Gen 2 Hyper-V VMs boot via EFI and have a standard EFI framebuffer
device. When the kdump kernel runs in such a VM, loading the efifb
driver may hang because of accessing the framebuffer at the wrong
memory address.
The scenario occurs when the hyperv_fb driver in the original kernel
moves the framebuffer to a different MMIO address because of conflicts
with an already-running efifb or simplefb driver. The hyperv_fb driver
then informs Hyper-V of the change, which is allowed by the Hyper-V FB
VMBus device protocol. However, when the kexec command loads the kdump
kernel into crash memory via the kexec_file_load() system call, the
system call doesn't know the framebuffer has moved, and it sets up the
kdump screen_info using the original framebuffer address. The transition
to the kdump kernel does not go through the Hyper-V host, so Hyper-V
does not reset the framebuffer address like it would do on a reboot.
When efifb tries to run, it accesses a non-existent framebuffer
address, which traps to the Hyper-V host. After many such accesses,
the Hyper-V host thinks the guest is being malicious, and throttles
the guest to the point that it runs very slowly or appears to have hung.
When the kdump kernel is loaded into crash memory via the kexec_load()
system call, the problem does not occur. In this case, the kexec command
builds the screen_info table itself in user space from data returned
by the FBIOGET_FSCREENINFO ioctl against /dev/fb0, which gives it the
new framebuffer location.
This problem was originally reported in 2020 [1], resulting in commit
3cb73bc3fa2a ("hyperv_fb: Update screen_info after removing old
framebuffer"). This commit solved the problem by setting orig_video_isVGA
to 0, so the kdump kernel was unaware of the EFI framebuffer. The efifb
driver did not try to load, and no hang occurred. But in 2024, commit
c25a19afb81c ("fbdev/hyperv_fb: Do not clear global screen_info")
effectively reverted 3cb73bc3fa2a. Commit c25a19afb81c has no reference
to 3cb73bc3fa2a, so perhaps it was done without knowing the implications
that were reported with 3cb73bc3fa2a. In any case, as of commit
c25a19afb81c, the original problem came back again.
Interestingly, the hyperv_drm driver does not have this problem because
it never moves the framebuffer. The difference is that the hyperv_drm
driver removes any conflicting framebuffers *before* allocating an MMIO
address, while the hyperv_fb drivers removes conflicting framebuffers
*after* allocating an MMIO address. With the "after" ordering, hyperv_fb
may encounter a conflict and move the framebuffer to a different MMIO
address. But the conflict is essentially bogus because it is removed
a few lines of code later.
Rather than fix the problem with the approach from 2020 in commit
3cb73bc3fa2a, instead slightly reorder the steps in hyperv_fb so
conflicting framebuffers are removed before allocating an MMIO address.
Then the default framebuffer MMIO address should always be available, and
there's never any confusion about which framebuffer address the kdump
kernel should use -- it's always the original address provided by
the Hyper-V host. This approach is already used by the hyperv_drm
driver, and is consistent with the usage guidelines at the head of
the module with the function aperture_remove_conflicting_devices().
This approach also solves a related minor problem when kexec_load()
is used to load the kdump kernel. With current code, unbinding and
rebinding the hyperv_fb driver could result in the framebuffer moving
back to the default framebuffer address, because on the rebind there
are no conflicts. If such a move is done after the kdump kernel is
loaded with the new framebuffer address, at kdump time it could again
have the wrong address.
This problem and fix are described in terms of the kdump kernel, but
it can also occur with any kernel started via kexec.
See extensive discussion of the problem and solution at [2].
[1] https://lore.kernel.org/linux-hyperv/20201014092429.1415040-1-kasong@redhat.com/
[2] https://lore.kernel.org/linux-hyperv/BLAPR10MB521793485093FDB448F7B2E5FDE92@BLAPR10MB5217.namprd10.prod.outlook.com/
Reported-by: Thomas Tai <thomas.tai@oracle.com>
Fixes: c25a19afb81c ("fbdev/hyperv_fb: Do not clear global screen_info")
Signed-off-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/20250218230130.3207-1-mhklinux@outlook.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20250218230130.3207-1-mhklinux@outlook.com>
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When a Hyper-V DRM device is probed, the driver allocates MMIO space for
the vram, and maps it cacheable. If the device removed, or in the error
path for device probing, the MMIO space is released but no unmap is done.
Consequently the kernel address space for the mapping is leaked.
Fix this by adding iounmap() calls in the device removal path, and in the
error path during device probing.
Fixes: f1f63cbb705d ("drm/hyperv: Fix an error handling path in hyperv_vmbus_probe()")
Fixes: a0ab5abced55 ("drm/hyperv : Removing the restruction of VRAM allocation with PCI bar size")
Signed-off-by: Michael Kelley <mhklinux@outlook.com>
Reviewed-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Tested-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Link: https://lore.kernel.org/r/20250210193441.2414-1-mhklinux@outlook.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20250210193441.2414-1-mhklinux@outlook.com>
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https://gitlab.freedesktop.org/agd5f/linux into drm-next
amdgpu:
- Fix spelling typos
- RAS updates
- VCN 5.0.1 updates
- SubVP fixes
- DCN 4.0.1 fixes
- MSO DPCD fixes
- DIO encoder refactor
- PCON fixes
- Misc cleanups
- DMCUB fixes
- USB4 DP fixes
- DM cleanups
- Backlight cleanups and fixes
- Support platform backlight curves
- Misc code cleanups
- SMU 14 fixes
- JPEG 4.0.3 reset updates
- SR-IOV fixes
- SVM fixes
- GC 12 DCC fixes
- DC DCE 6.x fix
- Hiberation fix
amdkfd:
- Fix possible NULL pointer in queue validation
- Remove unnecessary CP domain validation
- SDMA queue reset support
- Add per process flags
radeon:
- Fix spelling typos
- RS400 hyperZ fix
UAPI:
- Add KFD per process flags for setting precision
Proposed user space: https://github.com/ROCm/ROCR-Runtime/commit/2a64fa5e06e80e0af36df4ce0c76ae52eeec0a9d
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250307211051.1880472-1-alexander.deucher@amd.com
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We intentionally truncate the string and store only up to 20 characters
since the LCD display does not provide more chars. For that use
scnprintf() instead of snprintf() to avoid the warning.
Signed-off-by: Helge Deller <deller@gmx.de>
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This validates at compile time that the signatures match what is in the
header file. It highlights one annoyance with the compile-time check,
which is that it can only be used with functions marked unsafe.
If the function is not unsafe, then this error is emitted:
error[E0308]: `if` and `else` have incompatible types
--> <linux>/drivers/gpu/drm/drm_panic_qr.rs:987:19
|
986 | #[export]
| --------- expected because of this
987 | pub extern "C" fn drm_panic_qr_max_data_size(version: u8, url_len: usize) -> usize {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ expected unsafe fn, found safe fn
|
= note: expected fn item `unsafe extern "C" fn(_, _) -> _ {kernel::bindings::drm_panic_qr_max_data_size}`
found fn item `extern "C" fn(_, _) -> _ {drm_panic_qr_max_data_size}`
The signature declarations are moved to a header file so it can be
included in the Rust bindings helper, and the extern keyword is removed
as it is unnecessary.
Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org>
Reviewed-by: Tamir Duberstein <tamird@gmail.com>
Acked-by: Simona Vetter <simona.vetter@ffwll.ch>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://lore.kernel.org/r/20250303-export-macro-v3-5-41fbad85a27f@google.com
[ Fixed `rustfmt`. Moved on top the unsafe requirement comment to follow
the usual style, and slightly reworded it for clarity. Formatted
bindings helper comment. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are some small USB driver fixes for some reported issues. These
contain:
- typec driver fixes
- dwc3 driver fixes
- xhci driver fixes
- renesas controller fixes
- gadget driver fixes
- a new USB quirk added
All of these have been in linux-next with no reported issues"
* tag 'usb-6.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: typec: ucsi: Fix NULL pointer access
usb: quirks: Add DELAY_INIT and NO_LPM for Prolific Mass Storage Card Reader
usb: xhci: Fix host controllers "dying" after suspend and resume
usb: dwc3: Set SUSPENDENABLE soon after phy init
usb: hub: lack of clearing xHC resources
usb: renesas_usbhs: Flush the notify_hotplug_work
usb: renesas_usbhs: Use devm_usb_get_phy()
usb: renesas_usbhs: Call clk_put()
usb: dwc3: gadget: Prevent irq storm when TH re-executes
usb: gadget: Check bmAttributes only if configuration is valid
xhci: Restrict USB4 tunnel detection for USB3 devices to Intel hosts
usb: xhci: Enable the TRB overfetch quirk on VIA VL805
usb: gadget: Fix setting self-powered state on suspend
usb: typec: ucsi: increase timeout for PPM reset operations
acpi: typec: ucsi: Introduce a ->poll_cci method
usb: typec: tcpci_rt1711h: Unmask alert interrupts to fix functionality
usb: gadget: Set self-powered based on MaxPower and bmAttributes
usb: gadget: u_ether: Set is_suspend flag if remote wakeup fails
usb: atm: cxacru: fix a flaw in existing endpoint checks
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fix from Greg KH:
"Here is a single driver core fix that resolves a reported memory leak.
It's been in linux-next for 2 weeks now with no reported problems"
* tag 'driver-core-6.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
drivers: core: fix device leak in __fw_devlink_relax_cycles()
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc/IIO driver fixes from Greg KH:
"Here are a number of misc and char and iio driver fixes that have been
sitting in my tree for way too long. They contain:
- iio driver fixes for reported issues
- regression fix for rtsx_usb card reader
- mei and mhi driver fixes
- small virt driver fixes
- ntsync permissions fix
- other tiny driver fixes for reported problems.
All of these have been in linux-next for quite a while with no
reported issues"
* tag 'char-misc-6.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (30 commits)
Revert "drivers/card_reader/rtsx_usb: Restore interrupt based detection"
ntsync: Check wait count based on byte size.
bus: simple-pm-bus: fix forced runtime PM use
char: misc: deallocate static minor in error path
eeprom: digsy_mtc: Make GPIO lookup table match the device
drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl
binderfs: fix use-after-free in binder_devices
slimbus: messaging: Free transaction ID in delayed interrupt scenario
vbox: add HAS_IOPORT dependency
cdx: Fix possible UAF error in driver_override_show()
intel_th: pci: Add Panther Lake-P/U support
intel_th: pci: Add Panther Lake-H support
intel_th: pci: Add Arrow Lake support
intel_th: msu: Fix less trivial kernel-doc warnings
intel_th: msu: Fix kernel-doc warnings
MAINTAINERS: change maintainer for FSI
ntsync: Set the permissions to be 0666
bus: mhi: host: pci_generic: Use pci_try_reset_function() to avoid deadlock
mei: vsc: Use "wakeuphostint" when getting the host wakeup GPIO
mei: me: add panther lake P DID
...
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Add the initial nova-core driver stub.
nova-core is intended to serve as a common base for nova-drm (the
corresponding DRM driver) and the vGPU manager VFIO driver, serving as a
hard- and firmware abstraction layer for GSP-based NVIDIA GPUs.
The Nova project, including nova-core and nova-drm, in the long term,
is intended to serve as the successor of Nouveau for all GSP-based GPUs.
The motivation for both, starting a successor project for Nouveau and
doing so using the Rust programming language, is documented in detail
through a previous post on the mailing list [1], an LWN article [2] and a
talk from LPC '24.
In order to avoid the chicken and egg problem to require a user to
upstream Rust abstractions, but at the same time require the Rust
abstractions to implement the driver, nova-core kicks off as a driver
stub and is subsequently developed upstream.
Link: https://lore.kernel.org/dri-devel/Zfsj0_tb-0-tNrJy@cassiopeiae/T/#u [1]
Link: https://lwn.net/Articles/990736/ [2]
Link: https://youtu.be/3Igmx28B3BQ?si=sBdSEer4tAPKGpOs [3]
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Link: https://lore.kernel.org/r/20250306222336.23482-5-dakr@kernel.org
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
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This patch adds RDMA_TRANSPORT_RX and RDMA_TRANSPORT_TX as a new flow
table type for matcher creation.
Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://patch.msgid.link/2287d8c50483e880450c7e8e08d9de34cdec1b14.1741261611.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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Verify that the enabled UCAPs are supported by the device before
creating the ucontext.
If supported, create the ucontext with the associated capabilities.
Store the privileged ucontext UID on creation and remove it when
destroying the privileged ucontext. This allows the command interface
to recognize privileged commands through its UID.
Signed-off-by: Chiara Meiohas <cmeiohas@nvidia.com>
Link: https://patch.msgid.link/8b180583a207cb30deb7a2967934079749cdcc44.1741261611.git.leon@kernel.org
Reviewed-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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Add support for file descriptor array attribute for GET_CONTEXT
commands.
Check that the file descriptor (fd) array represents fds for valid UCAPs.
Store the enabled UCAPs from the fd array as a bitmask in ib_ucontext.
Signed-off-by: Chiara Meiohas <cmeiohas@nvidia.com>
Link: https://patch.msgid.link/ebfb30bc947e2259b193c96a319c80e82599045b.1741261611.git.leon@kernel.org
Reviewed-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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Create UCAP character devices when probing an IB device with supported
firmware capabilities.
If the RDMA_CTRL general object type is supported, check for specific
UCTX capabilities:
Create /dev/infiniband/mlx5_perm_ctrl_local for RDMA_UCAP_MLX5_CTRL_LOCAL
Create /dev/infiniband/mlx5_perm_ctrl_other_vhca for RDMA_UCAP_MLX5_CTRL_OTHER_VHCA
Signed-off-by: Chiara Meiohas <cmeiohas@nvidia.com>
Link: https://patch.msgid.link/30ed40e7a12a694cf4ee257459ed61b145b7837d.1741261611.git.leon@kernel.org
Reviewed-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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Implement a new User CAPabilities (UCAP) API to provide fine-grained
control over specific firmware features.
This approach offers more granular capabilities than the existing Linux
capabilities, which may be too generic for certain FW features.
This mechanism represents each capability as a character device with
root read-write access. Root processes can grant users special
privileges by allowing access to these character devices (e.g., using
chown).
UCAP character devices are located in /dev/infiniband and the class path
is /sys/class/infiniband_ucaps.
Signed-off-by: Chiara Meiohas <cmeiohas@nvidia.com>
Link: https://patch.msgid.link/5a1379187cd21178e8554afc81a3c941f21af22f.1741261611.git.leon@kernel.org
Reviewed-by: Yishai Hadas <yishaih@nvidia.com>
Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"33 hotfixes. 24 are cc:stable and the remainder address post-6.13
issues or aren't considered necessary for -stable kernels.
26 are for MM and 7 are for non-MM.
- "mm: memory_failure: unmap poisoned folio during migrate properly"
from Ma Wupeng fixes a couple of two year old bugs involving the
migration of hwpoisoned folios.
- "selftests/damon: three fixes for false results" from SeongJae Park
fixes three one year old bugs in the SAMON selftest code.
The remainder are singletons and doubletons. Please see the individual
changelogs for details"
* tag 'mm-hotfixes-stable-2025-03-08-16-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (33 commits)
mm/page_alloc: fix uninitialized variable
rapidio: add check for rio_add_net() in rio_scan_alloc_net()
rapidio: fix an API misues when rio_add_net() fails
MAINTAINERS: .mailmap: update Sumit Garg's email address
Revert "mm/page_alloc.c: don't show protection in zone's ->lowmem_reserve[] for empty zone"
mm: fix finish_fault() handling for large folios
mm: don't skip arch_sync_kernel_mappings() in error paths
mm: shmem: remove unnecessary warning in shmem_writepage()
userfaultfd: fix PTE unmapping stack-allocated PTE copies
userfaultfd: do not block on locking a large folio with raised refcount
mm: zswap: use ATOMIC_LONG_INIT to initialize zswap_stored_pages
mm: shmem: fix potential data corruption during shmem swapin
mm: fix kernel BUG when userfaultfd_move encounters swapcache
selftests/damon/damon_nr_regions: sort collected regiosn before checking with min/max boundaries
selftests/damon/damon_nr_regions: set ops update for merge results check to 100ms
selftests/damon/damos_quota: make real expectation of quota exceeds
include/linux/log2.h: mark is_power_of_2() with __always_inline
NFS: fix nfs_release_folio() to not deadlock via kcompactd writeback
mm, swap: avoid BUG_ON in relocate_cluster()
mm: swap: use correct step in loop to wait all clusters in wait_for_allocation()
...
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Fix typos and whitespace errors.
Link: https://lore.kernel.org/r/20250307231715.438518-1-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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My static checker says this multiplication can overflow. I'm not an
expert in this code but the call tree would be:
ib_uverbs_handler_UVERBS_METHOD_QP_CREATE() <- reads cap from the user
-> ib_create_qp_user()
-> create_qp()
-> mana_ib_create_qp()
-> mana_ib_create_ud_qp()
-> create_shadow_queue()
It can't hurt to use safer interfaces.
Fixes: c8017f5b4856 ("RDMA/mana_ib: UD/GSI work requests")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://patch.msgid.link/58439ac0-1ee5-4f96-a595-7ab83b59139b@stanley.mountain
Reviewed-by: Long Li <longli@microsoft.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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---------------------------------------------------------------------
Hi,
This is preparation series targeted for mlx5-next, which will be used
later in RDMA.
This series adds RDMA transport steering logic which would allow the
vport group manager to catch control packets from VFs and forward them
to control SW to help with congestion control.
In addition, RDMA will provide new set of APIs to better control exposed
FW capabilities and this series is needed to make sure mlx5 command
interface will ensure that privileged commands can always proceed,
Thanks
Link: https://lore.kernel.org/all/cover.1740574103.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
* mlx5-next:
net/mlx5: fs, add RDMA TRANSPORT steering domain support
net/mlx5: Query ADV_RDMA capabilities
net/mlx5: Limit non-privileged commands
net/mlx5: Allow the throttle mechanism to be more dynamic
net/mlx5: Add RDMA_CTRL HW capabilities
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Add RX and TX RDMA_TRANSPORT flow table namespace, and the ability
to create flow tables in those namespaces.
The RDMA_TRANSPORT RX and TX are per vport.
Packets will traverse through RDMA_TRANSPORT_RX after RDMA_RX and through
RDMA_TRANSPORT_TX before RDMA_TX, ensuring proper control and management.
RDMA_TRANSPORT domains are managed by the vport group manager.
Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Link: https://patch.msgid.link/a6b550d9859a197eafa804b9a8d76916ca481da9.1740574103.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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Query ADV_RDMA capabilities which provide information for
advanced RDMA related features.
Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Link: https://patch.msgid.link/e3e6ede03ea31cd201078dcdd4e407608e4a5a87.1740574103.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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Limit non-privileged UID commands to half of the available command slots
when privileged UIDs are present.
Privileged throttle commands will not be limited.
Use an xarray to store privileged UIDs. Add insert and remove functions
for privileged UIDs management.
Non-user commands (with uid 0) are not limited.
Signed-off-by: Chiara Meiohas <cmeiohas@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/d2f3dd9a0dbad3c9f2b4bb0723837995e4e06de2.1740574103.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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|
Previously, throttle commands were identified and limited based on
opcode. These commands were limited to half the command slots using a
semaphore, and callback commands checked the opcode to determine
semaphore release.
To allow exceptions, we introduce a variable to indicate when the
throttle lock is held. This allows scenarios where throttle commands
are not limited. Callback functions use this variable to determine
if the throttle semaphore needs to be released.
This patch contains no functional changes. It's a preparation for the
next patch.
Signed-off-by: Chiara Meiohas <cmeiohas@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Link: https://patch.msgid.link/055d975edeb816ac4c0fd1e665c6157d11947d26.1740574103.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
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Move the more esoteric helpers for netdev instance lock to
a dedicated header. This avoids growing netdevice.h to infinity
and makes rebuilding the kernel much faster (after touching
the header with the helpers).
The main netdev_lock() / netdev_unlock() functions are used
in static inlines in netdevice.h and will probably be used
most commonly, so keep them in netdevice.h.
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20250307183006.2312761-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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|
It is time to use netdev_lockdep_set_classes() in bpqether.c
List of related commits:
0bef512012b1 ("net: add netdev_lockdep_set_classes() to virtual drivers")
c74e1039912e ("net: bridge: use netdev_lockdep_set_classes()")
9a3c93af5491 ("vlan: use netdev_lockdep_set_classes()")
0d7dd798fd89 ("net: ipvlan: call netdev_lockdep_set_classes()")
24ffd752007f ("net: macvlan: call netdev_lockdep_set_classes()")
78e7a2ae8727 ("net: vrf: call netdev_lockdep_set_classes()")
d3fff6c443fe ("net: add netdev_lockdep_set_classes() helper")
syzbot reported:
WARNING: possible recursive locking detected
6.14.0-rc5-syzkaller-01064-g2525e16a2bae #0 Not tainted
dhcpcd/5501 is trying to acquire lock:
ffff8880797e2d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2765 [inline]
ffff8880797e2d28 (&dev->lock){+.+.}-{4:4}, at: register_netdevice+0x12d8/0x1b70 net/core/dev.c:11008
but task is already holding lock:
ffff88802e530d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2765 [inline]
ffff88802e530d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/linux/netdevice.h:2804 [inline]
ffff88802e530d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 net/core/dev_api.c:65
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&dev->lock);
lock(&dev->lock);
*** DEADLOCK ***
May be due to missing lock nesting notation
2 locks held by dhcpcd/5501:
#0: ffffffff8fed6848 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#0: ffffffff8fed6848 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x34c/0x1d80 net/ipv4/devinet.c:1121
#1: ffff88802e530d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock include/linux/netdevice.h:2765 [inline]
#1: ffff88802e530d28 (&dev->lock){+.+.}-{4:4}, at: netdev_lock_ops include/linux/netdevice.h:2804 [inline]
#1: ffff88802e530d28 (&dev->lock){+.+.}-{4:4}, at: dev_change_flags+0x120/0x270 net/core/dev_api.c:65
stack backtrace:
CPU: 1 UID: 0 PID: 5501 Comm: dhcpcd Not tainted 6.14.0-rc5-syzkaller-01064-g2525e16a2bae #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3039
check_deadlock kernel/locking/lockdep.c:3091 [inline]
validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3893
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
netdev_lock include/linux/netdevice.h:2765 [inline]
register_netdevice+0x12d8/0x1b70 net/core/dev.c:11008
bpq_new_device drivers/net/hamradio/bpqether.c:499 [inline]
bpq_device_event+0x4b1/0x8d0 drivers/net/hamradio/bpqether.c:542
notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
__dev_notify_flags+0x207/0x400
netif_change_flags+0xf0/0x1a0 net/core/dev.c:9442
dev_change_flags+0x146/0x270 net/core/dev_api.c:66
devinet_ioctl+0xea2/0x1d80 net/ipv4/devinet.c:1200
inet_ioctl+0x3d7/0x4f0 net/ipv4/af_inet.c:1001
sock_do_ioctl+0x158/0x460 net/socket.c:1190
sock_ioctl+0x626/0x8e0 net/socket.c:1309
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:906 [inline]
__se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Fixes: 7e4d784f5810 ("net: hold netdev instance lock during rtnetlink operations")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20250307160358.3153859-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Remove the superfluous function dw_pcie_ep_find_ext_capability(),
as it is virtually identical to dw_pcie_find_ext_capability().
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20250221202646.395252-3-cassel@kernel.org
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
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Fix a kernel oops found while testing the stm32_pcie Endpoint driver
with handling of PERST# deassertion:
During EP initialization, pci_epf_test_alloc_space() allocates all BARs,
which are further freed if epc_set_bar() fails (for instance, due to no
free inbound window).
However, when pci_epc_set_bar() fails, the error path:
pci_epc_set_bar() ->
pci_epf_free_space()
does not clear the previous assignment to epf_test->reg[bar].
Then, if the host reboots, the PERST# deassertion restarts the BAR
allocation sequence with the same allocation failure (no free inbound
window), creating a double free situation since epf_test->reg[bar] was
deallocated and is still non-NULL.
Thus, make sure that pci_epf_alloc_space() and pci_epf_free_space()
invocations are symmetric, and as such, set epf_test->reg[bar] to NULL
when memory is freed.
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Christian Bruel <christian.bruel@foss.st.com>
Link: https://lore.kernel.org/r/20250124123043.96112-1-christian.bruel@foss.st.com
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
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The static function devm_pci_epc_match() is only invoked within the
devm_pci_epc_destroy(). However, since it was initially introduced,
this new API has had no callers.
Thus, remove both the unused API and the static function.
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/r/20250217-remove_api-v2-1-b169c9117045@quicinc.com
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
|
