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Pull virtio updates from Michael Tsirkin:
"Tests, fixes and cleanups.
Just minor tweaks, there's nothing major in this cycle"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio_ring: mark vring_dma_dev inline
virtio/vhost: add Jason to list of maintainers
virtio_blk: Delete an unnecessary initialisation in init_vq()
virtio_blk: Use kmalloc_array() in init_vq()
virtio: remove config.c
virtio: console: Unlock vqs while freeing buffers
ringtest: poll for new buffers once before updating event index
ringtest: commonize implementation of poll_avail/poll_used
ringtest: use link-time optimization
virtio: update balloon size in balloon "probe"
virtio_ring: Make interrupt suppression spec compliant
virtio_pci: Limit DMA mask to 44 bits for legacy virtio devices
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Pull VFIO fix from Alex Williamson:
"SET_IRQS ioctl parameter sanitization (Vlad Tsyrklevich)"
* tag 'vfio-v4.9-rc4' of git://github.com/awilliam/linux-vfio:
vfio/pci: Fix integer overflows, bitmask check
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A system can get hung task timeouts if a qlogic board fails during
initialization (if the board breaks again or fails the init). The hang
involves the scsi scan.
In a nutshell, since commit beb9e315e6e0 ("qla2xxx: Prevent removal and
board_disable race"):
...it is possible to have freed ha (base_vha->hw) early by a call to
qla2x00_remove_one when pdev->enable_cnt equals zero:
if (!atomic_read(&pdev->enable_cnt)) {
scsi_host_put(base_vha->host);
kfree(ha);
pci_set_drvdata(pdev, NULL);
return;
Almost always, the scsi_host_put above frees the vha structure
(attached to the end of the Scsi_Host we're putting) since it's the last
put, and life is good. However, if we are entering this routine because
the adapter has broken sometime during initialization AND a scsi scan is
already in progress (and has done its own scsi_host_get), vha will not
be freed. What's worse, the scsi scan will access the freed ha structure
through qla2xxx_scan_finished:
if (time > vha->hw->loop_reset_delay * HZ)
return 1;
The scsi scan keeps checking to see if a scan is complete by calling
qla2xxx_scan_finished. There is a timeout value that limits the length
of time a scan can take (hw->loop_reset_delay, usually set to 5
seconds), but this definition is in the data structure (hw) that can get
freed early.
This can yield unpredictable results, the worst of which is that the
scsi scan can hang indefinitely. This happens when the freed structure
gets reused and loop_reset_delay gets overwritten with garbage, which
the scan obliviously uses as its timeout value.
The fix for this is simple: at the top of qla2xxx_scan_finished, check
for the UNLOADING bit in the vha structure (_vha is not freed at this
point). If UNLOADING is set, we exit the scan for this adapter
immediately. After this last reference to the ha structure, we'll exit
the scan for this adapter, and continue on.
This problem is hard to hit, but I have run into it doing negative
testing many times now (with a test specifically designed to bring it
out), so I can verify that this fix works. My testing has been against a
RHEL7 driver variant, but the bug and patch are equally relevant to to
the upstream driver.
Fixes: beb9e315e6e0 ("qla2xxx: Prevent removal and board_disable race")
Cc: <stable@vger.kernel.org> # v3.18+
Signed-off-by: Bill Kuzeja <william.kuzeja@stratus.com>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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In the current probe function the GPIO is acquired after the codec's
bus clock is enabled. However if it fails to acquire the GPIO due to
a deferred probe, it does not disable the bus clock before bailing out.
This would result in the clock being enabled multiple times.
Move the code that enables the bus clock after the part that gets the
GPIO, maintaining a separation between resource acquisition and device
enablement in the probe function.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
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When I push NFSv4.1 / RDMA hard, (xfstests generic/089, for example),
I get this crash on the server:
Oct 28 22:04:30 klimt kernel: general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
Oct 28 22:04:30 klimt kernel: Modules linked in: cts rpcsec_gss_krb5 iTCO_wdt iTCO_vendor_support sb_edac edac_core x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm btrfs irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd xor pcspkr raid6_pq i2c_i801 i2c_smbus lpc_ich mfd_core sg mei_me mei ioatdma shpchp wmi ipmi_si ipmi_msghandler rpcrdma ib_ipoib rdma_ucm acpi_power_meter acpi_pad ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c mlx4_ib mlx4_en ib_core sr_mod cdrom sd_mod ast drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm crc32c_intel igb ahci libahci ptp mlx4_core pps_core dca libata i2c_algo_bit i2c_core dm_mirror dm_region_hash dm_log dm_mod
Oct 28 22:04:30 klimt kernel: CPU: 7 PID: 1558 Comm: nfsd Not tainted 4.9.0-rc2-00005-g82cd754 #8
Oct 28 22:04:30 klimt kernel: Hardware name: Supermicro Super Server/X10SRL-F, BIOS 1.0c 09/09/2015
Oct 28 22:04:30 klimt kernel: task: ffff880835c3a100 task.stack: ffff8808420d8000
Oct 28 22:04:30 klimt kernel: RIP: 0010:[<ffffffffa05a759f>] [<ffffffffa05a759f>] release_lock_stateid+0x1f/0x60 [nfsd]
Oct 28 22:04:30 klimt kernel: RSP: 0018:ffff8808420dbce0 EFLAGS: 00010246
Oct 28 22:04:30 klimt kernel: RAX: ffff88084e6660f0 RBX: ffff88084e667020 RCX: 0000000000000000
Oct 28 22:04:30 klimt kernel: RDX: 0000000000000007 RSI: 0000000000000000 RDI: ffff88084e667020
Oct 28 22:04:30 klimt kernel: RBP: ffff8808420dbcf8 R08: 0000000000000001 R09: 0000000000000000
Oct 28 22:04:30 klimt kernel: R10: ffff880835c3a100 R11: ffff880835c3aca8 R12: 6b6b6b6b6b6b6b6b
Oct 28 22:04:30 klimt kernel: R13: ffff88084e6670d8 R14: ffff880835f546f0 R15: ffff880835f1c548
Oct 28 22:04:30 klimt kernel: FS: 0000000000000000(0000) GS:ffff88087bdc0000(0000) knlGS:0000000000000000
Oct 28 22:04:30 klimt kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Oct 28 22:04:30 klimt kernel: CR2: 00007ff020389000 CR3: 0000000001c06000 CR4: 00000000001406e0
Oct 28 22:04:30 klimt kernel: Stack:
Oct 28 22:04:30 klimt kernel: ffff88084e667020 0000000000000000 ffff88084e6670d8 ffff8808420dbd20
Oct 28 22:04:30 klimt kernel: ffffffffa05ac80d ffff880835f54548 ffff88084e640008 ffff880835f545b0
Oct 28 22:04:30 klimt kernel: ffff8808420dbd70 ffffffffa059803d ffff880835f1c768 0000000000000870
Oct 28 22:04:30 klimt kernel: Call Trace:
Oct 28 22:04:30 klimt kernel: [<ffffffffa05ac80d>] nfsd4_free_stateid+0xfd/0x1b0 [nfsd]
Oct 28 22:04:30 klimt kernel: [<ffffffffa059803d>] nfsd4_proc_compound+0x40d/0x690 [nfsd]
Oct 28 22:04:30 klimt kernel: [<ffffffffa0583114>] nfsd_dispatch+0xd4/0x1d0 [nfsd]
Oct 28 22:04:30 klimt kernel: [<ffffffffa047bbf9>] svc_process_common+0x3d9/0x700 [sunrpc]
Oct 28 22:04:30 klimt kernel: [<ffffffffa047ca64>] svc_process+0xf4/0x330 [sunrpc]
Oct 28 22:04:30 klimt kernel: [<ffffffffa05827ca>] nfsd+0xfa/0x160 [nfsd]
Oct 28 22:04:30 klimt kernel: [<ffffffffa05826d0>] ? nfsd_destroy+0x170/0x170 [nfsd]
Oct 28 22:04:30 klimt kernel: [<ffffffff810b367b>] kthread+0x10b/0x120
Oct 28 22:04:30 klimt kernel: [<ffffffff810b3570>] ? kthread_stop+0x280/0x280
Oct 28 22:04:30 klimt kernel: [<ffffffff8174e8ba>] ret_from_fork+0x2a/0x40
Oct 28 22:04:30 klimt kernel: Code: c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 55 41 54 53 48 8b 87 b0 00 00 00 48 89 fb 4c 8b a0 98 00 00 00 <49> 8b 44 24 20 48 8d b8 80 03 00 00 e8 10 66 1a e1 48 89 df e8
Oct 28 22:04:30 klimt kernel: RIP [<ffffffffa05a759f>] release_lock_stateid+0x1f/0x60 [nfsd]
Oct 28 22:04:30 klimt kernel: RSP <ffff8808420dbce0>
Oct 28 22:04:30 klimt kernel: ---[ end trace cf5d0b371973e167 ]---
Jeff Layton says:
> Hm...now that I look though, this is a little suspicious:
>
> struct nfs4_openowner *oo = openowner(stp->st_openstp->st_stateowner);
>
> I wonder if it's possible for the openstateid to have already been
> destroyed at this point.
>
> We might be better off doing something like this to get the client pointer:
>
> stp->st_stid.sc_client;
>
> ...which should be more direct and less dependent on other stateids
> staying valid.
With the suggested change, I am no longer able to reproduce the above oops.
v2: Fix unhash_lock_stateid() as well
Fix-suggested-by: Jeff Layton <jlayton@redhat.com>
Fixes: 42691398be08 ('nfsd: Fix race between FREE_STATEID and LOCK')
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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The underlying transport releases the page pointed to by rq_buffer
during xprt_rdma_bc_send_request. When the backchannel reply arrives,
rq_rbuffer then points to freed memory.
Fixes: 68778945e46f ('SUNRPC: Separate buffer pointers for RPC ...')
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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This fixes the irq allocation in this driver to not print:
irq: Cannot allocate irq_descs @ IRQ34, assuming pre-allocated
irq: Cannot allocate irq_descs @ IRQ66, assuming pre-allocated
Which happens because the driver already called irq_alloc_descs()
and so the change to use irq_domain_add_simple resulted in calling
irq_alloc_descs() twice.
Modernize the irq allocation in this driver to use the
irq_domain_add_linear flow directly and eliminate the use of
irq_domain_add_simple/legacy
Fixes: ce931f571b6d ("gpio/mvebu: convert to use irq_domain_add_simple()")
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The code at the end of alua_rtpg_work() is as follows:
scsi_device_put(sdev);
kref_put(&pg->kref, release_port_group);
In other words, alua_rtpg_queue() must hold an sdev reference and a pg
reference before queueing rtpg work. If no rtpg work is queued no
additional references should be held when alua_rtpg_queue() returns. If
no rtpg work is queued, ensure that alua_rtpg_queue() only gives up the
sdev reference if that reference was obtained by the same
alua_rtpg_queue() call.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reported-by: Tang Junhui <tang.junhui@zte.com.cn>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Tang Junhui <tang.junhui@zte.com.cn>
Cc: <stable@vger.kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The vmw_pvscsi driver reports most successful aborts as FAILED to the
scsi error handler. This is do to a misunderstanding of how
completion_done() works and its interaction with a successful wait using
wait_for_completion_timeout(). The vmw_pvscsi driver is expecting
completion_done() to always return true if complete() has been called on
the completion structure. But completion_done() returns true after
complete() has been called only if no function like
wait_for_completion_timeout() has seen the completion and cleared it as
part of successfully waiting for the completion.
Instead of using completion_done(), vmw_pvscsi should just use the
return value from wait_for_completion_timeout() to know if the wait
timed out or not.
[mkp: bumped driver version per request]
Signed-off-by: David Jeffery <djeffery@redhat.com>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Acked-by: Jim Gill <jgill@vmware.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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While merging mpt3sas & mpt2sas code, we added the is_warpdrive check
condition on the wrong line
---------------------------------------------------------------------------
scsih_target_alloc(struct scsi_target *starget)
sas_target_priv_data->handle = raid_device->handle;
sas_target_priv_data->sas_address = raid_device->wwid;
sas_target_priv_data->flags |= MPT_TARGET_FLAGS_VOLUME;
- raid_device->starget = starget;
+ sas_target_priv_data->raid_device = raid_device;
+ if (ioc->is_warpdrive)
+ raid_device->starget = starget;
}
spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
return 0;
------------------------------------------------------------------------------
That check should be for the line sas_target_priv_data->raid_device =
raid_device;
Due to above hunk, we are not initializing raid_device's starget for
raid volumes, and so during raid disk deletion driver is not calling
scsi_remove_target() API as driver observes starget field of
raid_device's structure as NULL.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@broadcom.com>
Cc: <stable@vger.kernel.org> # v4.4+
Fixes: 7786ab6aff9 ("mpt3sas: Ported WarpDrive product SSS6200 support")
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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Reference count of pg leaks in alua_rtpg_work() since kref_put() is not
called to decrease the reference count of pg when the condition
pg->rtpg_sdev==NULL satisfied (actually it is easy to satisfy), it would
cause memory of pg leakage.
Signed-off-by: tang.junhui <tang.junhui@zte.com.cn>
Cc: <stable@vger.kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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The "What:" field at the ABI should describe the location of
the ABI, e. g. the position under a mounted sysfs. However,
this file has only the basename without the path.
Fix it.
Cc: Vernon Mauery <vernux@us.ibm.com>
Cc: platform-driver-x86@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
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The coalesce settings behave badly when changing just one value:
... # ethtool -c eth0
rx-usecs: 249
... # ethtool -C eth0 tx-usecs 250
... # ethtool -c eth0
rx-usecs: 248
This occurs due to rounding errors when calculating the microseconds
value - the divisons round down. This causes (eg) the rx-usecs to
decrease by one every time the tx-usecs value is set as per the above.
Fix this by making the divison round-to-nearest.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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'create_root_ns()' does not return an error pointer, so the test can be
simplified to be more consistent.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Abstract unix domain socket may embed null characters,
these should be translated to '@' when printed out to
proc the same way the null prefix is currently being
translated.
This helps for tools such as netstat, lsof and the proc
based implementation in ss to show all the significant
bytes of the name (instead of getting cut at the first
null occurrence).
Signed-off-by: Isaac Boukris <iboukris@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The documentation says that SGMII_LN_UCDR_SO_GAIN_MODE0 should be
set to 0, not 6, on the Qualcomm Technologies QDF2432.
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Iyappan Subramanian says:
====================
drivers: net: xgene: Fix coalescing bugs
This patch set fixes the following,
1. Since ethernet v1 hardware has a bug related to coalescing,
disabling this feature
2. Fixing ethernet v2 hardware, interrupt trigger region
id to 2, to kickoff coalescing
====================
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Changing the interrupt trigger region id to 2 and the
corresponding threshold set0/set1 values to 8/16.
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Toan Le <toanle@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since ethernet v1 hardware has a bug related to coalescing, disabling
this feature.
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Toan Le <toanle@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Allow architectures to create asm/asm-prototypes.h file that
provides C prototypes for exported asm functions, which enables
proper CRC versions to be generated for them.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
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In commit 9a56e5d6a0ba ("Drivers: hv: make VMBus bus ids persistent")
the name of vmbus devices in sysfs changed to be (in 4.9-rc1):
/sys/bus/vmbus/vmbus-6aebe374-9ba0-11e6-933c-00259086b36b
The prefix ("vmbus-") is redundant and differs from how PCI is
represented in sysfs. Therefore simplify to:
/sys/bus/vmbus/6aebe374-9ba0-11e6-933c-00259086b36b
Please merge this before 4.9 is released and the old format
has to live forever.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This subsystem consistently fails to drop the device reference taken by
class_find_device().
Note that some of these lookup functions already take a reference to the
returned data, while others claim no reference is needed (or does not
seem need one).
Fixes: 183b9b592a62 ("uwb: add the UWB stack (core files)")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus
Felipe writes:
usb: fixes for v4.9-rc4
Three more fixes for current -rc cycle. One
randbuild fix on dwc3-st which was lacking
<linux/pinctrl/consumer.h>, removal of IRQ
throttling for networking gadgets and a fix for
dwc3's error handling on failed initialization.
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According to Dave Miller "the networking stack has a
hard requirement that all SKBs which are transmitted
must have their completion signalled in a fininte
amount of time. This is because, until the SKB is
freed by the driver, it holds onto socket,
netfilter, and other subsystem resources."
In summary, this means that using TX IRQ throttling
for the networking gadgets is, at least, complex and
we should avoid it for the time being.
Cc: <stable@vger.kernel.org>
Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Suggested-by: David Miller <davem@davemloft.net>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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stack freeing
If something goes wrong with task stack refcounting and a stack
refcount hits zero too early, warn and leak it rather than
potentially freeing it early (and silently).
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/f29119c783a9680a4b4656e751b6123917ace94b.1477926663.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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When converting to a shared library in ac5a181d065d ("cpupower: Add
cpuidle parts into library"), cpu_freq_cpu_exists() was converted to
cpupower_is_cpu_online(). cpu_req_cpu_exists() returned 0 on success and
-ENOSYS on failure whereas cpupower_is_cpu_online returns 1 on success.
Check for the correct return value in cpufreq-set.
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1374212
Fixes: ac5a181d065d (cpupower: Add cpuidle parts into library)
Reported-by: Julian Seward <jseward@acm.org>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Acked-by: Thomas Renninger <trenn@suse.com>
Cc: 4.7+ <stable@vger.kernel.org> # 4.7+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Check whether the kernel really supports power resources for a device,
otherwise the power might not be removed when the device is runtime
suspended (DSM should still work in these cases where PR does not).
This is a workaround for a problem where ACPICA and Windows 10 differ in
behavior. ACPICA does not correctly enumerate power resources within a
conditional block (due to delayed execution of such blocks) and as a
result power_resources is set to false even if _PR3 exists.
Fixes: 692a17dcc292 ("drm/nouveau/acpi: fix lockup with PCIe runtime PM")
Link: https://bugs.freedesktop.org/show_bug.cgi?id=98398
Reported-and-tested-by: Rick Kerkhof <rick.2889@gmail.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: stable@vger.kernel.org # v4.8+
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2016-10-31
this is a pull request of two patches for the upcoming v4.9 release.
The first patch is by Lukas Resch for the sja1000 plx_pci driver that adds
support for Moxa CAN devices. The second patch is by Oliver Hartkopp and fixes
a potential kernel panic in the CAN broadcast manager.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Current bgmac code initializes some DMA settings in the receive control
register for some hardware and then immediately clears those settings.
Not clearing those settings results in ~420Mbps *improvement* in
throughput; this system can now receive frames at line-rate on Broadcom
5871x hardware compared to ~520Mbps today. I also tested a few other
values but found there to be no discernible difference in CPU
utilization even if burst size and prefetching values are different.
On the hardware tested there was no need to keep the code that cleared
all but bits 16-17, but since there is a wide variety of hardware that
used this driver (I did not look at all hardware docs for hardware using
this IP block), I find it wise to move this call up and clear bits just
after reading the default value from the hardware rather than completely
removing it.
This is a good candidate for -stable >=3.14 since that is when the code
that was supposed to improve performance (but did not) was introduced.
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Fixes: 56ceecde1f29 ("bgmac: initialize the DMA controller of core...")
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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At smp_prepare_cpus() we set present cpu mask as part of init
for all CPUs at range [0-max_cpus].
This is done without checking if this mask is already being set.
At platform of eznps this mask is already being initialized at
smp_init_cpus() by using hook plat_smp_ops.init_early_smp().
So to avoid overriding of present cpu mask we check the number of
bits which are set in this mask. At the begin only bit for boot CPU
is set so if number of bits already set is no more than one we can be
assure that there is no overriding of this mask.
Signed-off-by: Noam Camus <noamca@mellanox.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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Now when we have properly working performance counters in nSIM
even with interrupt support (fix should be a part of upcoming
nSIM engineering build 2016.12-005) we may enable perf support
by default for all platforms that use nSIM for ARC cores simulation.
Note 1: PCT node was missing for some reason in nsimosci.dts
while all other nSIM-related .dts files already had
PCT node for quite some time, so adding it now.
Note 2: All defconfigs were regenerated with "make savedefconfig"
which led to some clean-ups in nsimosci_hs_smp_defconfig:
CONFIG_FRAMEBUFFER_CONSOLE=y was removed because it is
automatically selected now by DRM.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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into drm-fixes
Pull the staging fixes tree I had into rc3 to make real -fixes again.
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Group index is incremented on every new group parsed. Since the
field is part of struct imx_pinctrl_soc_info, which is typically
a global variable passed by the individual pinctrl-imx.c based
driver, it does not get cleared automatically when re-probing the
driver. This lead imx_pinctrl_parse_functions passing a group
pointer which is outside of the allocated group space on second
probe and onwards. Typically this ended up in a NULL pointer
dereference when accessing the name field like this:
Unable to handle kernel NULL pointer dereference at virtual address 00000000
...
PC is at strcmp+0x18/0x44
LR is at imx_dt_node_to_map+0xc4/0x290
Avoid this by setting group_index to 0 on probe.
This has been observed when using DEBUG_TEST_DRIVER_REMOVE.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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stm32 pinctrl driver could be probed even if no interrupt controller
is defined to manage gpio irqs. Entries related to gpio irq management
are moved to optional.
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This patch allows to probe stm32 pinctrl driver even if no interrupt
controller is defined to manage gpio irqs.
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Thanks to 332e99d5ae4 which now alerts of default
trigger usage when configuring interrupts.
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Since commit 44a7185c2ae6 ("of/platform: Add common method to populate
default bus"), ARM64 platform devices are populated at the
arch_initcall_sync level; as a result, the platform_driver_probe calls
in both the iProc and NSP GPIO drivers fail with -ENODEV since by that
time the platform device was not yet registered.
Replace platform_driver_probe with platform_driver_register, that allow
the device to be register later
Fixes: 44a7185c2ae6 ("of/platform: Add common method to populate default bus")
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Tested-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Sylvain Lemieux reports the LPC32xx GPIO driver is broken since
commit 762c2e46c059 ("gpio: of: remove of_gpiochip_and_xlate() and
struct gg_data"). Probably, gpio-etraxfs.c and gpio-davinci.c are
broken too.
Those drivers register multiple gpio_chip that are associated to a
single OF node, and their own .of_xlate() checks if the passed
gpio_chip is valid.
Now, the problem is of_find_gpiochip_by_node() returns the first
gpio_chip found to match the given node. So, .of_xlate() fails,
except for the first GPIO bank.
Reverting the commit could be a solution, but I do not want to go
back to the mess of struct gg_data. Another solution here is to
take the match by a node pointer and the success of .of_xlate().
It is a bit clumsy to call .of_xlate twice; for gpio_chip matching
and for really getting the gpio_desc index. Perhaps, our long-term
goal might be to convert the drivers to single chip registration,
but this commit will solve the problem until then.
Fixes: 762c2e46c059 ("gpio: of: remove of_gpiochip_and_xlate() and struct gg_data")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reported-by: Sylvain Lemieux <slemieux.tyco@gmail.com>
Tested-by: David Lechner <david@lechnology.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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When allocating a new line handle or event a file is allocated that it is
associated to. The file is attached to a file descriptor of the current
process and the file descriptor is returned to userspace using
copy_to_user(). If this copy operation fails the line handle or event
allocation is aborted, all acquired resources are freed and an error is
returned.
But the file struct is not freed and left attached to the userspace
application and even though the file descriptor number was not copied it is
trivial to guess. If a userspace application performs a IOCTL on such a
left over file descriptor it will trigger a use-after-free and if the file
descriptor is closed (latest when the application exits) a double-free is
triggered.
anon_inode_getfd() performs 3 tasks, allocate a file struct, allocate a
file descriptor for the current process and install the file struct in the
file descriptor. As soon as the file struct is installed in the file
descriptor it is accessible by userspace (even if the IOCTL itself hasn't
completed yet), this means uninstalling the fd on the error path is not an
option, since userspace might already got a reference to the file.
Instead anon_inode_getfd() needs to be broken into its individual steps.
The allocation of the file struct and file descriptor is done first, then
the copy_to_user() is executed and only if it succeeds the file is
installed.
Since the file struct is reference counted it can not be just freed, but
its reference needs to be dropped, which will also call the release()
callback, which will free the state attached to the file. So in this case
the normal error cleanup path should not be taken.
Cc: stable@vger.kernel.org
Fixes: d932cd49182f ("gpio: free handles in fringe cases")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Xin Long says:
====================
sctp: a bunch of fixes by holding transport
There are several places where it holds assoc after getting transport by
searching from transport rhashtable, it may cause use-after-free issue.
This patchset is to fix them by holding transport instead.
v1->v2:
Fix the changelog of patch 2/3
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Prior to this patch, in rx path, before calling lock_sock, it needed to
hold assoc when got it by __sctp_lookup_association, in case other place
would free/put assoc.
But in __sctp_lookup_association, it lookup and hold transport, then got
assoc by transport->assoc, then hold assoc and put transport. It means
it didn't hold transport, yet it was returned and later on directly
assigned to chunk->transport.
Without the protection of sock lock, the transport may be freed/put by
other places, which would cause a use-after-free issue.
This patch is to fix this issue by holding transport instead of assoc.
As holding transport can make sure to access assoc is also safe, and
actually it looks up assoc by searching transport rhashtable, to hold
transport here makes more sense.
Note that the function will be renamed later on on another patch.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Prior to this patch, it used a local variable to save the transport that is
looked up by __sctp_lookup_association(), and didn't return it back. But in
sctp_rcv, it is used to initialize chunk->transport. So when hitting this,
even if it found the transport, it was still initializing chunk->transport
with null instead.
This patch is to return the transport back through transport pointer
that is from __sctp_rcv_lookup_harder().
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In sctp_transport_lookup_process(), Commit 1cceda784980 ("sctp: fix
the issue sctp_diag uses lock_sock in rcu_read_lock") moved cb() out
of rcu lock, but it put transport and hold assoc instead, and ignore
that cb() still uses transport. It may cause a use-after-free issue.
This patch is to hold transport instead of assoc there.
Fixes: 1cceda784980 ("sctp: fix the issue sctp_diag uses lock_sock in rcu_read_lock")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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While grant reference is of type uint32_t, xen-netfront erroneously casts
it to signed short in BUG_ON().
This would lead to the xen domU panic during boot-up or migration when it
is attached with lots of paravirtual devices.
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Andrey Konovalov reported an issue with proc_register in bcm.c.
As suggested by Cong Wang this patch adds a lock_sock() protection and
a check for unsuccessful proc_create_data() in bcm_connect().
Reference: http://marc.info/?l=linux-netdev&m=147732648731237
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Suggested-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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This patch adds support for Moxa CAN devices.
Signed-off-by: Lukas Resch <l.resch@incubedit.com>
Signed-off-by: Christoph Zehentner <c.zehentner@incubedit.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers
Kalle Valo says:
====================
wireless-drivers fixes for 4.9
iwlwifi
* some fixes for suspend/resume with unified FW images
* a fix for a false-positive lockdep report
* a fix for multi-queue that caused an unnecessary 1 second latency
* a fix for an ACPI parsing bug that caused a misleading error message
brcmfmac
* fix a variable uninitialised warning in brcmf_cfg80211_start_ap()
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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In the device, a MID entry represents a group of local ports, which can
later be bound to a MDB entry.
The lookup of an existing MID entry is currently done using the provided
MC MAC address and VID, from the Linux bridge. However, this can result
in an incorrect reuse of the same MID index in different VLAN-unaware
bridges (same IP MC group and VID 0).
Fix this by performing the lookup based on FID instead of VID, which is
unique across different bridges.
Fixes: 3a49b4fde2a1 ("mlxsw: Adding layer 2 multicast support")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Elad Raz <eladr@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When an interface is configured to use Tx/Rx-only queues,
the length of the statistics would be shortened to accomodate only the
statistics required per-each queue, and the values would be provided
accordingly.
However, the strings provided would still contain both Tx and Rx strings
for each one of the queues [regardless of its configuration], which might
lead to out-of-bound access when filling the buffers as well as incorrect
statistics presented.
Fixes: 9a4d7e86acf3 ("qede: Add support for Tx/Rx-only queues.")
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Sending zero checksum is ok for TCP, but not for UDP.
UDPv6 receiver should by default drop a frame with a 0 checksum,
and UDPv4 would not verify the checksum and might accept a corrupted
packet.
Simply replace such checksum by 0xffff, regardless of transport.
This error was caught on SIT tunnels, but seems generic.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Maciej Żenczykowski <maze@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Acked-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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