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2022-04-24nvmem: sunplus-ocotp: staticize sp_otp_v0Krzysztof Kozlowski
The "sp_otp_v0" file scope variable is not used outside, so make it static to fix warning: drivers/nvmem/sunplus-ocotp.c:74:29: sparse: sparse: symbol 'sp_otp_v0' was not declared. Should it be static? Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20220321110326.44652-2-krzk@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-24nvmem: bcm-ocotp: mark ACPI device ID table as maybe unusedKrzysztof Kozlowski
"bcm_otpc_acpi_ids" is used with ACPI_PTR, so a build with !CONFIG_ACPI has a warning: drivers/nvmem/bcm-ocotp.c:247:36: error: ‘bcm_otpc_acpi_ids’ defined but not used [-Werror=unused-const-variable=] Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20220321110326.44652-1-krzk@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-24char: misc: remove usage of list iterator past the loop bodyJakob Koschel
In preparation to limit the scope of the list iterator to the list traversal loop, use a dedicated pointer pointing to the found element [1]. Link: https://lore.kernel.org/all/YhdfEIwI4EdtHdym@kroah.com/ Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com> Link: https://lore.kernel.org/r/20220319201454.2511733-1-jakobkoschel@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-24pinctrl: pistachio: fix use of irq_of_parse_and_map()Lv Ruyi
The irq_of_parse_and_map() function returns 0 on failure, and does not return an negative value. Fixes: cefc03e5995e ("pinctrl: Add Pistachio SoC pin control driver") Reported-by: Zeal Robot <zealci@zte.com.cn> Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn> Link: https://lore.kernel.org/r/20220424031430.3170759-1-lv.ruyi@zte.com.cn Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2022-04-23Merge tag 'scsi-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fix from James Bottomley: "One fix for an information leak caused by copying a buffer to userspace without checking for error first in the sr driver" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: sr: Do not leak information in ioctl
2022-04-23Merge tag 'for-linus-5.18-rc4-tag' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen fixes from Juergen Gross: "A simple cleanup patch and a refcount fix for Xen on Arm" * tag 'for-linus-5.18-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: arm/xen: Fix some refcount leaks xen: Convert kmap() to kmap_local_page()
2022-04-23Merge tag 'drm-fixes-2022-04-23' of git://anongit.freedesktop.org/drm/drmLinus Torvalds
Pull more drm fixes from Dave Airlie: "Maarten was away, so Maxine stepped up and sent me the drm-fixes merge, so no point leaving it for another week. The big change is an OF revert around bridge/panels, it may have some driver fallout, but hopefully this revert gets them shook out in the next week easier. Otherwise it's a bunch of locking/refcounts across drivers, a radeon dma_resv logic fix and some raspberry pi panel fixes. panel: - revert of patch that broke panel/bridge issues dma-buf: - remove unused header file. amdgpu: - partial revert of locking change radeon: - fix dma_resv logic inversion panel: - pi touchscreen panel init fixes vc4: - build fix - runtime pm refcount fix vmwgfx: - refcounting fix" * tag 'drm-fixes-2022-04-23' of git://anongit.freedesktop.org/drm/drm: drm/amdgpu: partial revert "remove ctx->lock" v2 Revert "drm: of: Lookup if child node has panel or bridge" Revert "drm: of: Properly try all possible cases for bridge/panel detection" drm/vc4: Use pm_runtime_resume_and_get to fix pm_runtime_get_sync() usage drm/vmwgfx: Fix gem refcounting and memory evictions drm/vc4: Fix build error when CONFIG_DRM_VC4=y && CONFIG_RASPBERRYPI_FIRMWARE=m drm/panel/raspberrypi-touchscreen: Initialise the bridge in prepare drm/panel/raspberrypi-touchscreen: Avoid NULL deref if not initialised dma-buf-map: remove renamed header file drm/radeon: fix logic inversion in radeon_sync_resv
2022-04-23Merge tag 'input-for-v5.18-rc3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Pull input fixes from Dmitry Torokhov: - a new set of keycodes to be used by marine navigation systems - minor fixes to omap4-keypad and cypress-sf drivers * tag 'input-for-v5.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: add Marine Navigation Keycodes Input: omap4-keypad - fix pm_runtime_get_sync() error checking Input: cypress-sf - register a callback to disable the regulators
2022-04-23Merge tag 'block-5.18-2022-04-22' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull block fixes from Jens Axboe: "Just two small regression fixes for bcache" * tag 'block-5.18-2022-04-22' of git://git.kernel.dk/linux-block: bcache: fix wrong bdev parameter when calling bio_alloc_clone() in do_bio_hook() bcache: put bch_bio_map() back to correct location in journal_write_unlocked()
2022-04-23bus: mhi: host: Add support for Cinterion MV32-WA/MV32-WBSlark Xiao
MV32-WA is designed based on Qualcomm SDX62, and MV32-WB is designed based on QUalcomm SDX65. Both products' enumeration would align with previous product MV31-W.So we merge MV31 and MV32 to MV3X for some common settings. Signed-off-by: Slark Xiao <slark_xiao@163.com> Reviewed-by: Loic Poulain <loic.poulain@linaro.org> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Link: https://lore.kernel.org/r/20220421092141.3984-1-slark_xiao@163.com [mani: removed the fixes tag that's not needed] Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2022-04-23bus: mhi: host: Optimize and update MMIO register write methodBhaumik Bhatt
As of now, MMIO writes done after ready state transition use the mhi_write_reg_field() API even though the whole register is being written in most cases. Optimize this process by using mhi_write_reg() API instead for those writes and use the mhi_write_reg_field() API for MHI config registers only. Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org> Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by: Hemant Kumar <hemantk@codeaurora.org> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/1650304226-11080-3-git-send-email-quic_jhugo@quicinc.com Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2022-04-23bus: mhi: host: Bail on writing register fields if read failsBhaumik Bhatt
Helper API to write register fields relies on successful reads of the register/address prior to the write. Bail out if a failure is seen when reading the register before the actual write is performed. Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org> Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by: Hemant Kumar <hemantk@codeaurora.org> Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/1650304226-11080-2-git-send-email-quic_jhugo@quicinc.com Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2022-04-23bus: mhi: host: Wait for ready state after resetJeffrey Hugo
After the device has signaled the end of reset by clearing the reset bit, it will automatically reinit MHI and the internal device structures. Once That is done, the device will signal it has entered the ready state. Signaling the ready state involves sending an interrupt (MSI) to the host which might cause IOMMU faults if it occurs at the wrong time. If the controller is being powered down, and possibly removed, then the reset flow would only wait for the end of reset. At which point, the host and device would start a race. The host may complete its reset work, and remove the interrupt handler, which would cause the interrupt to be disabled in the IOMMU. If that occurs before the device signals the ready state, then the IOMMU will fault since it blocked an interrupt. While harmless, the fault would appear like a serious issue has occurred so let's silence it by making sure the device hits the ready state before the host completes its reset processing. Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by: Hemant Kumar <quic_hemantk@quicinc.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/1650302562-30964-1-git-send-email-quic_jhugo@quicinc.com Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2022-04-23bus: mhi: host: Add soc_reset sysfsJeffrey Hugo
The MHI bus supports a standardized hardware reset, which is known as the "SoC Reset". This reset is similar to the reset sysfs for PCI devices - a hardware mechanism to reset the state back to square one. The MHI SoC Reset is described in the spec as a reset of last resort. If some unrecoverable error has occurred where other resets have failed, SoC Reset is the "big hammer" that ungracefully resets the device. This is effectivly the same as yanking the power on the device, and reapplying it. However, depending on the nature of the particular issue, the underlying transport link may remain active and configured. If the link remains up, the device will flag a MHI system error early in the boot process after the reset is executed, which allows the MHI bus to process a fatal error event, and clean up appropiately. While the SoC Reset is generally intended as a means of recovery when all else has failed, it can be useful in non-error scenarios. For example, if the device loads firmware from the host filesystem, the device may need to be fully rebooted inorder to pick up the new firmware. In this scenario, the system administrator may use the soc_reset sysfs to cause the device to pick up the new firmware that the admin placed on the filesystem. Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by: Bhaumik Bhatt <quic_bbhatt@quicinc.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/1650302327-30439-1-git-send-email-quic_jhugo@quicinc.com Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2022-04-23bus: mhi: host: pci_generic: Sort mhi_pci_id_table based on the PIDManivannan Sadhasivam
Sorting this way helps in identifying the products of vendors. There is no sorting required for VID and the new VID should be added as the last entry. Let's also add a note clarifying this. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Reviewed-by: Daniele Palmas <dnlplm@gmail.com> Link: https://lore.kernel.org/r/20220411133428.42165-1-manivannan.sadhasivam@linaro.org Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2022-04-23bus: mhi: host: Use cached values for calculating the shared write pointerJeffrey Hugo
mhi_recycle_ev_ring() computes the shared write pointer for the ring (ctxt_wp) using a read/modify/write pattern where the ctxt_wp value in the shared memory is read, incremented, and written back. There are no checks on the read value, it is assumed that it is kept in sync with the locally cached value. Per the MHI spec, this is correct. The device should only read ctxt_wp, never write it. However, there are devices in the wild that violate the spec, and can update the ctxt_wp in a specific scenario. This can cause corruption, and violate the above assumption that the ctxt_wp is in sync with the cached value. This can occur when the device has loaded firmware from the host, and is transitioning from the SBL EE to the AMSS EE. As part of shutting down SBL, the SBL flushes it's local MHI context to the shared memory since the local context will not persist across an EE change. In the case of the event ring, SBL will flush its entire context, not just the parts that it is allowed to update. This means SBL will write to ctxt_wp, and possibly corrupt it. An example: Host Device ---- --- Update ctxt_wp to 0x1f0 SBL observes 0x1f0 Update ctxt_wp to 0x0 Starts transition to AMSS EE Context flush, writes 0x1f0 to ctxt_wp Update ctxt_wp to 0x200 Update ctxt_wp to 0x210 AMSS observes 0x210 0x210 exceeds ring size AMSS signals syserr The reason the ctxt_wp goes off the end of the ring is that the rollover check is only performed on the cached wp, which is out of sync with ctxt_wp. Since the host is the authority of the value of ctxt_wp per the MHI spec, we can fix this issue by not reading ctxt_wp from the shared memory, and instead compute it based on the cached value. If SBL corrupts ctxt_wp, the host won't observe it, and will correct the value at some point later. Signed-off-by: Jeffrey Hugo <quic_jhugo@quicinc.com> Reviewed-by: Hemant Kumar <quic_hemantk@quicinc.com> Reviewed-by: Bhaumik Bhatt <quic_bbhatt@quicinc.com> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/1649868113-18826-1-git-send-email-quic_jhugo@quicinc.com [mani: used the quicinc domain for Hemant and Bhaumik] Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2022-04-23interconnect: qcom: constify qcom_icc_bcm pointersKrzysztof Kozlowski
Pointers to struct qcom_icc_bcm are not modified, so they can be made const for safety. The contents of struct qcom_icc_bcm must stay non-const. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20220412102623.227607-3-krzysztof.kozlowski@linaro.org Signed-off-by: Georgi Djakov <djakov@kernel.org>
2022-04-23interconnect: qcom: constify icc_node pointersKrzysztof Kozlowski
Pointers to struct qcom_icc_node (and similar structures) are not modified, so they can be made const for safety. The contents of struct qcom_icc_node must stay non-const. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20220412102623.227607-2-krzysztof.kozlowski@linaro.org Signed-off-by: Georgi Djakov <djakov@kernel.org>
2022-04-23interconnect: qcom: constify qcom_icc_descKrzysztof Kozlowski
struct qcom_icc_desc is not modified so it can be made const for safety. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20220412102623.227607-1-krzysztof.kozlowski@linaro.org Signed-off-by: Georgi Djakov <djakov@kernel.org>
2022-04-23topology: Fix up build warning in topology_is_visible()Greg Kroah-Hartman
Commit aa63a74d4535 ("topology/sysfs: Hide PPIN on systems that do not support it.") caused a build warning on some configurations: drivers/base/topology.c: In function 'topology_is_visible': drivers/base/topology.c:158:24: warning: unused variable 'dev' [-Wunused-variable] 158 | struct device *dev = kobj_to_dev(kobj); Fix this up by getting rid of the variable entirely. Fixes: aa63a74d4535 ("topology/sysfs: Hide PPIN on systems that do not support it.") Cc: Tony Luck <tony.luck@intel.com> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Link: https://lore.kernel.org/r/20220422062653.3899972-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-23Merge tag 'usb-serial-5.18-rc4' of ↵Greg Kroah-Hartman
https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus Johan writes: USB-serial fixes for 5.18-rc4 Here's a fix for a potential overflow issue in the whiteheat driver when using the old ARM ABI. Included are also some new modem device ids. All have been in linux-next with no reported issues. * tag 'usb-serial-5.18-rc4' of https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial: USB: serial: whiteheat: fix heap overflow in WHITEHEAT_GET_DTR_RTS USB: serial: cp210x: add PIDs for Kamstrup USB Meter Reader USB: serial: option: add support for Cinterion MV32-WA/MV32-WB USB: serial: option: add Telit 0x1057, 0x1058, 0x1075 compositions
2022-04-23Merge tag 'drm-misc-fixes-2022-04-22' of ↵Dave Airlie
git://anongit.freedesktop.org/drm/drm-misc into drm-fixes Two fixes for the raspberrypi panel initialisation, one fix for a logic inversion in radeon, a build and pm refcounting fix for vc4, two reverts for drm_of_get_bridge that caused a number of regression and a locking regression for amdgpu. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <maxime@cerno.tech> Link: https://patchwork.freedesktop.org/patch/msgid/20220422084403.2xrhf3jusdej5yo4@houat
2022-04-22clk: microchip: mpfs: add RTCREF clock controlConor Dooley
The reference clock used by the PolarFire SoC's onboard rtc was missing from the clock driver. Add this clock at the "config" clock level, with the external reference clock as its parent. Fixes: 635e5e73370e ("clk: microchip: Add driver for Microchip PolarFire SoC") Reviewed-by: Daire McNamara <daire.mcnamara@microchip.com> Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20220413075835.3354193-9-conor.dooley@microchip.com Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2022-04-22clk: microchip: mpfs: re-parent the configurable clocksConor Dooley
Currently the mpfs clock driver uses a reference clock called the "msspll", set in the device tree, as the parent for the cpu/axi/ahb (config) clocks. The frequency of the msspll is determined by the FPGA bitstream & the bootloader configures the clock to match the bitstream. The real reference is provided by a 100 or 125 MHz off chip oscillator. However, the msspll clock is not actually the parent of all clocks on the system - the reference clock for the rtc/mtimer actually has the off chip oscillator as its parent. In order to fix this, add support for reading the configuration of the msspll & reparent the "config" clocks so that they are derived from this clock rather than the reference in the device tree. Fixes: 635e5e73370e ("clk: microchip: Add driver for Microchip PolarFire SoC") Reviewed-by: Daire McNamara <daire.mcnamara@microchip.com> Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20220413075835.3354193-8-conor.dooley@microchip.com Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2022-04-22clk: microchip: mpfs: mark CLK_ATHENA as criticalConor Dooley
CLK_ATHENA is another fabric interconnect and should be marked as critical as with FIC0-3, since disabling it will cause part of the fabric to go into reset. Fixes: 635e5e73370e ("clk: microchip: Add driver for Microchip PolarFire SoC") Reviewed-by: Daire McNamara <daire.mcnamara@microchip.com> Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20220413075835.3354193-3-conor.dooley@microchip.com Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2022-04-22clk: microchip: mpfs: fix parents for FIC clocksConor Dooley
The fabric interconnects are on the AXI bus not AHB. Update their parent clocks to fix this. Fixes: 635e5e73370e ("clk: microchip: Add driver for Microchip PolarFire SoC") Reviewed-by: Daire McNamara <daire.mcnamara@microchip.com> Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20220413075835.3354193-2-conor.dooley@microchip.com Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2022-04-22Merge tag 'ata-5.18-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata Pull ATA fix from Damien Le Moal: "A single fix to avoid a NULL pointer dereference in the pata_marvell driver with adapters not supporting DMA, from Zheyu" * tag 'ata-5.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata: ata: pata_marvell: Check the 'bmdma_addr' beforing reading
2022-04-22net: ethernet: stmmac: fix write to sgmii_adapter_baseDinh Nguyen
I made a mistake with the commit a6aaa0032424 ("net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link"). I should have tested against both scenario of having a SGMII interface and one without. Without the SGMII PCS TSE adpater, the sgmii_adapter_base address is NULL, thus a write to this address will fail. Cc: stable@vger.kernel.org Fixes: a6aaa0032424 ("net: ethernet: stmmac: fix altr_tse_pcs function when using a fixed-link") Signed-off-by: Dinh Nguyen <dinguyen@kernel.org> Link: https://lore.kernel.org/r/20220420152345.27415-1-dinguyen@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-22wireguard: device: check for metadata_dst with skb_valid_dst()Nikolay Aleksandrov
When we try to transmit an skb with md_dst attached through wireguard we hit a null pointer dereference in wg_xmit() due to the use of dst_mtu() which calls into dst_blackhole_mtu() which in turn tries to dereference dst->dev. Since wireguard doesn't use md_dsts we should use skb_valid_dst(), which checks for DST_METADATA flag, and if it's set, then falls back to wireguard's device mtu. That gives us the best chance of transmitting the packet; otherwise if the blackhole netdev is used we'd get ETH_MIN_MTU. [ 263.693506] BUG: kernel NULL pointer dereference, address: 00000000000000e0 [ 263.693908] #PF: supervisor read access in kernel mode [ 263.694174] #PF: error_code(0x0000) - not-present page [ 263.694424] PGD 0 P4D 0 [ 263.694653] Oops: 0000 [#1] PREEMPT SMP NOPTI [ 263.694876] CPU: 5 PID: 951 Comm: mausezahn Kdump: loaded Not tainted 5.18.0-rc1+ #522 [ 263.695190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1.fc35 04/01/2014 [ 263.695529] RIP: 0010:dst_blackhole_mtu+0x17/0x20 [ 263.695770] Code: 00 00 00 0f 1f 44 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 8b 47 10 48 83 e0 fc 8b 40 04 85 c0 75 09 48 8b 07 <8b> 80 e0 00 00 00 c3 66 90 0f 1f 44 00 00 48 89 d7 be 01 00 00 00 [ 263.696339] RSP: 0018:ffffa4a4422fbb28 EFLAGS: 00010246 [ 263.696600] RAX: 0000000000000000 RBX: ffff8ac9c3553000 RCX: 0000000000000000 [ 263.696891] RDX: 0000000000000401 RSI: 00000000fffffe01 RDI: ffffc4a43fb48900 [ 263.697178] RBP: ffffa4a4422fbb90 R08: ffffffff9622635e R09: 0000000000000002 [ 263.697469] R10: ffffffff9b69a6c0 R11: ffffa4a4422fbd0c R12: ffff8ac9d18b1a00 [ 263.697766] R13: ffff8ac9d0ce1840 R14: ffff8ac9d18b1a00 R15: ffff8ac9c3553000 [ 263.698054] FS: 00007f3704c337c0(0000) GS:ffff8acaebf40000(0000) knlGS:0000000000000000 [ 263.698470] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 263.698826] CR2: 00000000000000e0 CR3: 0000000117a5c000 CR4: 00000000000006e0 [ 263.699214] Call Trace: [ 263.699505] <TASK> [ 263.699759] wg_xmit+0x411/0x450 [ 263.700059] ? bpf_skb_set_tunnel_key+0x46/0x2d0 [ 263.700382] ? dev_queue_xmit_nit+0x31/0x2b0 [ 263.700719] dev_hard_start_xmit+0xd9/0x220 [ 263.701047] __dev_queue_xmit+0x8b9/0xd30 [ 263.701344] __bpf_redirect+0x1a4/0x380 [ 263.701664] __dev_queue_xmit+0x83b/0xd30 [ 263.701961] ? packet_parse_headers+0xb4/0xf0 [ 263.702275] packet_sendmsg+0x9a8/0x16a0 [ 263.702596] ? _raw_spin_unlock_irqrestore+0x23/0x40 [ 263.702933] sock_sendmsg+0x5e/0x60 [ 263.703239] __sys_sendto+0xf0/0x160 [ 263.703549] __x64_sys_sendto+0x20/0x30 [ 263.703853] do_syscall_64+0x3b/0x90 [ 263.704162] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 263.704494] RIP: 0033:0x7f3704d50506 [ 263.704789] Code: 48 c7 c0 ff ff ff ff eb b7 66 2e 0f 1f 84 00 00 00 00 00 90 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 72 c3 90 55 48 83 ec 30 44 89 4c 24 2c 4c 89 [ 263.705652] RSP: 002b:00007ffe954b0b88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 263.706141] RAX: ffffffffffffffda RBX: 0000558bb259b490 RCX: 00007f3704d50506 [ 263.706544] RDX: 000000000000004a RSI: 0000558bb259b7b2 RDI: 0000000000000003 [ 263.706952] RBP: 0000000000000000 R08: 00007ffe954b0b90 R09: 0000000000000014 [ 263.707339] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe954b0b90 [ 263.707735] R13: 000000000000004a R14: 0000558bb259b7b2 R15: 0000000000000001 [ 263.708132] </TASK> [ 263.708398] Modules linked in: bridge netconsole bonding [last unloaded: bridge] [ 263.708942] CR2: 00000000000000e0 Fixes: e7096c131e51 ("net: WireGuard secure network tunnel") Link: https://github.com/cilium/cilium/issues/19428 Reported-by: Martynas Pumputis <m@lambda.lt> Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-22net: dsa: realtek: remove realtek,rtl8367s stringLuiz Angelo Daros de Luca
There is no need to add new compatible strings for each new supported chip version. The compatible string is used only to select the subdriver (rtl8365mb.c or rtl8366rb.c). Once in the subdriver, it will detect the chip model by itself, ignoring which compatible string was used. Link: https://lore.kernel.org/netdev/20220414014055.m4wbmr7tdz6hsa3m@bang-olufsen.dk/ Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com> Reviewed-by: Alvin Šipraga <alsi@bang-olufsen.dk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Acked-by: Arınç ÜNAL <arinc.unal@arinc9.com> Link: https://lore.kernel.org/r/20220418233558.13541-2-luizluca@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-04-23pinctrl: stm32: Keep pinctrl block clock enabled when LEVEL IRQ requestedMarek Vasut
The current EOI handler for LEVEL triggered interrupts calls clk_enable(), register IO, clk_disable(). The clock manipulation requires locking which happens with IRQs disabled in clk_enable_lock(). Instead of turning the clock on and off all the time, enable the clock in case LEVEL interrupt is requested and keep the clock enabled until all LEVEL interrupts are freed. The LEVEL interrupts are an exception on this platform and seldom used, so this does not affect the common case. This simplifies the LEVEL interrupt handling considerably and also fixes the following splat found when using preempt-rt: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at kernel/locking/rtmutex.c:2040 __rt_mutex_trylock+0x37/0x62 Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.109-rt65-stable-standard-00068-g6a5afc4b1217 #85 Hardware name: STM32 (Device Tree Support) [<c010a45d>] (unwind_backtrace) from [<c010766f>] (show_stack+0xb/0xc) [<c010766f>] (show_stack) from [<c06353ab>] (dump_stack+0x6f/0x84) [<c06353ab>] (dump_stack) from [<c01145e3>] (__warn+0x7f/0xa4) [<c01145e3>] (__warn) from [<c063386f>] (warn_slowpath_fmt+0x3b/0x74) [<c063386f>] (warn_slowpath_fmt) from [<c063b43d>] (__rt_mutex_trylock+0x37/0x62) [<c063b43d>] (__rt_mutex_trylock) from [<c063c053>] (rt_spin_trylock+0x7/0x16) [<c063c053>] (rt_spin_trylock) from [<c036a2f3>] (clk_enable_lock+0xb/0x80) [<c036a2f3>] (clk_enable_lock) from [<c036ba69>] (clk_core_enable_lock+0x9/0x18) [<c036ba69>] (clk_core_enable_lock) from [<c034e9f3>] (stm32_gpio_get+0x11/0x24) [<c034e9f3>] (stm32_gpio_get) from [<c034ef43>] (stm32_gpio_irq_trigger+0x1f/0x48) [<c034ef43>] (stm32_gpio_irq_trigger) from [<c014aa53>] (handle_fasteoi_irq+0x71/0xa8) [<c014aa53>] (handle_fasteoi_irq) from [<c0147111>] (generic_handle_irq+0x19/0x22) [<c0147111>] (generic_handle_irq) from [<c014752d>] (__handle_domain_irq+0x55/0x64) [<c014752d>] (__handle_domain_irq) from [<c0346f13>] (gic_handle_irq+0x53/0x64) [<c0346f13>] (gic_handle_irq) from [<c0100ba5>] (__irq_svc+0x65/0xc0) Exception stack(0xc0e01f18 to 0xc0e01f60) 1f00: 0000300c 00000000 1f20: 0000300c c010ff01 00000000 00000000 c0e00000 c0e07714 00000001 c0e01f78 1f40: c0e07758 00000000 ef7cd0ff c0e01f68 c010554b c0105542 40000033 ffffffff [<c0100ba5>] (__irq_svc) from [<c0105542>] (arch_cpu_idle+0xc/0x1e) [<c0105542>] (arch_cpu_idle) from [<c063be95>] (default_idle_call+0x21/0x3c) [<c063be95>] (default_idle_call) from [<c01324f7>] (do_idle+0xe3/0x1e4) [<c01324f7>] (do_idle) from [<c01327b3>] (cpu_startup_entry+0x13/0x14) [<c01327b3>] (cpu_startup_entry) from [<c0a00c13>] (start_kernel+0x397/0x3d4) [<c0a00c13>] (start_kernel) from [<00000000>] (0x0) ---[ end trace 0000000000000002 ]--- Power consumption measured on STM32MP157C DHCOM SoM is not increased or is below noise threshold. Fixes: 47beed513a85b ("pinctrl: stm32: Add level interrupt support to gpio irq chip") Signed-off-by: Marek Vasut <marex@denx.de> Cc: Alexandre Torgue <alexandre.torgue@foss.st.com> Cc: Fabien Dessenne <fabien.dessenne@foss.st.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Marc Zyngier <maz@kernel.org> Cc: linux-stm32@st-md-mailman.stormreply.com Cc: linux-arm-kernel@lists.infradead.org To: linux-gpio@vger.kernel.org Reviewed-by: Fabien Dessenne <fabien.dessenne@foss.st.com> Link: https://lore.kernel.org/r/20220421140827.214088-1-marex@denx.de Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2022-04-22pinctrl: rockchip: sort the rk3308_mux_recalced_data entriesLuca Ceresoli
All the entries are sorted according to num/pin except for two entries. Sort them too. Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20220420142432.248565-2-luca.ceresoli@bootlin.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2022-04-22pinctrl: rockchip: fix RK3308 pinmux bitsLuca Ceresoli
Some of the pinmuxing bits described in rk3308_mux_recalced_data are wrong, pointing to non-existing registers. Fix the entire table. Also add a comment in front of each entry with the same string that appears in the datasheet to make the table easier to compare with the docs. This fix has been tested on real hardware for the gpio3b3_sel entry. Fixes: 7825aeb7b208 ("pinctrl: rockchip: add rk3308 SoC support") Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Link: https://lore.kernel.org/r/20220420142432.248565-1-luca.ceresoli@bootlin.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2022-04-22Merge tag 'samsung-pinctrl-fixes-5.18' of ↵Linus Walleij
https://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/samsung into fixes Samsung pinctrl drivers fixes for v5.18 1. Fix sparse warning introduced in v5.18-rc1. 2. Fix possible unmet Kconfig dependency with COMPILE_TEST, present since v4.3 or earlier.
2022-04-22gpio: Request interrupts after IRQ is initializedMario Limonciello
Commit 5467801f1fcb ("gpio: Restrict usage of GPIO chip irq members before initialization") attempted to fix a race condition that lead to a NULL pointer, but in the process caused a regression for _AEI/_EVT declared GPIOs. This manifests in messages showing deferred probing while trying to allocate IRQs like so: amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x0000 to IRQ, err -517 amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x002C to IRQ, err -517 amd_gpio AMDI0030:00: Failed to translate GPIO pin 0x003D to IRQ, err -517 [ .. more of the same .. ] The code for walking _AEI doesn't handle deferred probing and so this leads to non-functional GPIO interrupts. Fix this issue by moving the call to `acpi_gpiochip_request_interrupts` to occur after gc->irc.initialized is set. Fixes: 5467801f1fcb ("gpio: Restrict usage of GPIO chip irq members before initialization") Link: https://lore.kernel.org/linux-gpio/BL1PR12MB51577A77F000A008AA694675E2EF9@BL1PR12MB5157.namprd12.prod.outlook.com/ Link: https://bugzilla.suse.com/show_bug.cgi?id=1198697 Link: https://bugzilla.kernel.org/show_bug.cgi?id=215850 Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1979 Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1976 Reported-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Reviewed-by: Shreeya Patel <shreeya.patel@collabora.com> Tested-By: Samuel Čavoj <samuel@cavoj.net> Tested-By: lukeluk498@gmail.com Link: Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-and-tested-by: Takashi Iwai <tiwai@suse.de> Cc: Shreeya Patel <shreeya.patel@collabora.com> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-04-22Merge tag 'riscv-for-linus-5.18-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux Pull RISC-V fixes Palmer Dabbelt: - A pair of build fixes for the recent cpuidle driver - A fix for systems without sv57 that manifests as a crash early in boot * tag 'riscv-for-linus-5.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: RISC-V: cpuidle: fix Kconfig select for RISCV_SBI_CPUIDLE RISC-V: mm: Fix set_satp_mode() for platform not having Sv57 cpuidle: riscv: support non-SMP config
2022-04-22Merge tag 'arm64-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Will Deacon: "There's no real pattern to the fixes, but the main one fixes our pmd_leaf() definition to resolve a NULL dereference on the migration path. - Fix PMU event validation in the absence of any event counters - Fix allmodconfig build using clang in conjunction with binutils - Fix definitions of pXd_leaf() to handle PROT_NONE entries - More typo fixes" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: mm: fix p?d_leaf() arm64: fix typos in comments arm64: Improve HAVE_DYNAMIC_FTRACE_WITH_REGS selection for clang arm_pmu: Validate single/group leader events
2022-04-22Merge tag 'sound-5.18-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "At this time, the majority of changes are for pending ASoC fixes while a few usual HD-audio and USB-audio quirks are found. Almost all patches are small device-specific fixes, and nothing worrisome stands out, so far" * tag 'sound-5.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (37 commits) ALSA: hda/realtek: Add quirk for Clevo NP70PNP ALSA: hda: intel-dsp-config: Add RaptorLake PCI IDs ALSA: hda/realtek: Enable mute/micmute LEDs and limit mic boost on EliteBook 845/865 G9 ALSA: usb-audio: Clear MIDI port active flag after draining ALSA: usb-audio: add mapping for MSI MAG X570S Torpedo MAX. ALSA: hda/i915: Fix one too many pci_dev_put() ALSA: hda/hdmi: add HDMI codec VID for Raptorlake-P ALSA: hda/hdmi: fix warning about PCM count when used with SOF sound/oss/dmasound: fix 'dmasound_setup' defined but not used firmware: cs_dsp: Fix overrun of unterminated control name string ASoC: codecs: Fix an error handling path in (rx|tx|va)_macro_probe() ASoC: Intel: sof_es8336: Add a quirk for Huawei Matebook D15 ASoC: Intel: sof_es8336: add a quirk for headset at mic1 port ASoC: Intel: sof_es8336: support a separate gpio to control headphone ASoC: Intel: sof_es8336: simplify speaker gpio naming ASoC: wm8731: Disable the regulator when probing fails ASoC: Intel: soc-acpi: correct device endpoints for max98373 ASoC: codecs: wcd934x: do not switch off SIDO Buck when codec is in use ASoC: SOF: topology: Fix memory leak in sof_control_load() ASoC: SOF: topology: cleanup dailinks on widget unload ...
2022-04-22binder: Gracefully handle BINDER_TYPE_FDA objects with num_fds=0Alessandro Astone
Some android userspace is sending BINDER_TYPE_FDA objects with num_fds=0. Like the previous patch, this is reproducible when playing a video. Before commit 09184ae9b575 BINDER_TYPE_FDA objects with num_fds=0 were 'correctly handled', as in no fixup was performed. After commit 09184ae9b575 we aggregate fixup and skip regions in binder_ptr_fixup structs and distinguish between the two by using the skip_size field: if it's 0, then it's a fixup, otherwise skip. When processing BINDER_TYPE_FDA objects with num_fds=0 we add a skip region of skip_size=0, and this causes issues because now binder_do_deferred_txn_copies will think this was a fixup region. To address that, return early from binder_translate_fd_array to avoid adding an empty skip region. Fixes: 09184ae9b575 ("binder: defer copies of pre-patched txn data") Acked-by: Todd Kjos <tkjos@google.com> Cc: stable <stable@kernel.org> Signed-off-by: Alessandro Astone <ales.astone@gmail.com> Link: https://lore.kernel.org/r/20220415120015.52684-1-ales.astone@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-22binder: Address corner cases in deferred copy and fixupAlessandro Astone
When handling BINDER_TYPE_FDA object we are pushing a parent fixup with a certain skip_size but no scatter-gather copy object, since the copy is handled standalone. If BINDER_TYPE_FDA is the last children the scatter-gather copy loop will never stop to skip it, thus we are left with an item in the parent fixup list. This will trigger the BUG_ON(). This is reproducible in android when playing a video. We receive a transaction that looks like this: obj[0] BINDER_TYPE_PTR, parent obj[1] BINDER_TYPE_PTR, child obj[2] BINDER_TYPE_PTR, child obj[3] BINDER_TYPE_FDA, child Fixes: 09184ae9b575 ("binder: defer copies of pre-patched txn data") Acked-by: Todd Kjos <tkjos@google.com> Cc: stable <stable@kernel.org> Signed-off-by: Alessandro Astone <ales.astone@gmail.com> Link: https://lore.kernel.org/r/20220415120015.52684-2-ales.astone@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-22binder: hold fd_install until allocating fds firstCarlos Llamas
Al noted in [1] that fd_install can't be undone, so it must come last in the fd translation sequence, only after we've successfully reserved all descriptors and copied them into the transaction buffer. This patch takes Al's proposed fix in [2] and makes a few tweaks to fold the traversal of t->fd_fixups during release. [1] https://lore.kernel.org/driverdev-devel/YHnJwRvUhaK3IM0l@zeniv-ca.linux.org.uk [2] https://lore.kernel.org/driverdev-devel/YHo6Ln9VI1T7RmLK@zeniv-ca.linux.org.uk Cc: Christian Brauner <christian.brauner@ubuntu.com> Suggested-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Todd Kjos <tkjos@google.com> Signed-off-by: Carlos Llamas <cmllamas@google.com> Link: https://lore.kernel.org/r/20220325232454.2210817-1-cmllamas@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-22firmware: xilinx: enable feature check for ZynqMPRonak Jain
Enable the feature check if the PM_FEATURE_CHECK API returns success with the supported version for the ZynqMP. Currently, it is enabled for Versal only. Move get_set_conduit_method() at the beginning as the Linux is requesting to TF-A for the PM_FEATURE_CHECK API version for which the interface should be enabled with TF-A. Signed-off-by: Ronak Jain <ronak.jain@xilinx.com> Link: https://lore.kernel.org/r/1649242526-17493-5-git-send-email-ronak.jain@xilinx.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-22firmware: xilinx: always check API version for IOCTL/QUERYRonak Jain
Currently, we are not checking feature check version for PM APIs as the support may or may not there in the firmware. To check the whether the feature check API is supported or not in the firmware, allow checking for its own version. Signed-off-by: Ronak Jain <ronak.jain@xilinx.com> Link: https://lore.kernel.org/r/1649242526-17493-4-git-send-email-ronak.jain@xilinx.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-22firmware: xilinx: add new function for do_feature_check_callRonak Jain
Add new function for sending feature check request to firmware and call it from zynqmp_pm_feature(). Signed-off-by: Ronak Jain <ronak.jain@xilinx.com> Link: https://lore.kernel.org/r/1649242526-17493-3-git-send-email-ronak.jain@xilinx.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-22firmware: xilinx: add support for IOCTL and QUERY ID feature checkRonak Jain
Add support to check if IOCTL ID or QUERY ID is supported in firmware or not. Signed-off-by: Ronak Jain <ronak.jain@xilinx.com> Link: https://lore.kernel.org/r/1649242526-17493-2-git-send-email-ronak.jain@xilinx.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-22thermal/governor: Remove deprecated informationDaniel Lezcano
The userspace governor is still in use on production systems and the deprecating warning is scary. Even if we want to get rid of the userspace governor, it is too soon yet as the alternatives are not yet adopted. Change the deprecated warning by an information message suggesting to switch to the netlink thermal events. Fixes: 0275c9fb0eff ("thermal/core: Make the userspace governor deprecated") Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2022-04-22Revert "thermal/core: Deprecate changing cooling device state from userspace"Daniel Lezcano
This reverts commit a67a46af4ad6342378e332b7420c1d1a2818c53f. It has been reported the warning is annoying as the cooling device state is still needed on some production system. Meanwhile we provide a way to consolidate the thermal framework to prevent multiple actors acting on the cooling devices with conflicting decisions, let's revert this warning. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2022-04-22serial: 8250: Correct the clock for EndRun PTP/1588 PCIe deviceMaciej W. Rozycki
The EndRun PTP/1588 dual serial port device is based on the Oxford Semiconductor OXPCIe952 UART device with the PCI vendor:device ID set for EndRun Technologies and is therefore driven by a fixed 62.5MHz clock input derived from the 100MHz PCI Express clock. The clock rate is divided by the oversampling rate of 16 as it is supplied to the baud rate generator, yielding the baud base of 3906250. Replace the incorrect baud base of 4000000 with the right value of 3906250 then, complementing commit 6cbe45d8ac93 ("serial: 8250: Correct the clock for OxSemi PCIe devices"). Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk> Cc: stable <stable@kernel.org> Fixes: 1bc8cde46a159 ("8250_pci: Added driver for Endrun Technologies PTP PCIe card.") Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/alpine.DEB.2.21.2204181515270.9383@angie.orcam.me.uk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-22serial: 8250: Also set sticky MCR bits in console restorationMaciej W. Rozycki
Sticky MCR bits are lost in console restoration if console suspending has been disabled. This currently affects the AFE bit, which works in combination with RTS which we set, so we want to make sure the UART retains control of its FIFO where previously requested. Also specific drivers may need other bits in the future. Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk> Fixes: 4516d50aabed ("serial: 8250: Use canary to restart console after suspend") Cc: stable@vger.kernel.org # v4.0+ Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/alpine.DEB.2.21.2204181518490.9383@angie.orcam.me.uk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-22tty: n_gsm: fix software flow control handlingDaniel Starke
n_gsm is based on the 3GPP 07.010 and its newer version is the 3GPP 27.010. See https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1516 The changes from 07.010 to 27.010 are non-functional. Therefore, I refer to the newer 27.010 here. Chapter 5.4.8.1 states that XON/XOFF characters shall be used instead of Fcon/Fcoff command in advanced option mode to handle flow control. Chapter 5.4.8.2 describes how XON/XOFF characters shall be handled. Basic option mode only used Fcon/Fcoff commands and no XON/XOFF characters. These are treated as data bytes here. The current implementation uses the gsm_mux field 'constipated' to handle flow control from the remote peer and the gsm_dlci field 'constipated' to handle flow control from each DLCI. The later is unrelated to this patch. The gsm_mux field is correctly set for Fcon/Fcoff commands in gsm_control_message(). However, the same is not true for XON/XOFF characters in gsm1_receive(). Disable software flow control handling in the tty to allow explicit handling by n_gsm. Add the missing handling in advanced option mode for gsm_mux in gsm1_receive() to comply with the standard. This patch depends on the following commit: Commit 8838b2af23ca ("tty: n_gsm: fix SW flow control encoding/handling") Fixes: e1eaea46bb40 ("tty: n_gsm line discipline") Cc: stable@vger.kernel.org Signed-off-by: Daniel Starke <daniel.starke@siemens.com> Link: https://lore.kernel.org/r/20220422071025.5490-3-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>