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| Filename | Latest commit message | Latest commit date |
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f780e4ace1
[ Upstream commit d7fb5c361c2a2666d20e044206e1756bc8e87df2 ] If vimc module is removed while streaming is in progress, sensor subdev unregister runs into general protection fault when it tries to unregister media entities. This is a common subdev problem related to releasing pads from v4l2_device_unregister_subdev() before calling unregister. Unregister references pads during unregistering subdev. The sd release handler is the right place for releasing all sd resources including pads. The release handlers currently release all resources except the pads. Fix v4l2_device_unregister_subdev() not release pads and release pads from the sd_int_op release handlers. kernel: [ 4136.715839] general protection fault: 0000 [#1] SMP PTI kernel: [ 4136.715847] CPU: 2 PID: 1972 Comm: bash Not tainted 5.3.0-rc2+ #4 kernel: [ 4136.715850] Hardware name: Dell Inc. OptiPlex 790/0HY9JP, BIOS A18 09/24/2013 kernel: [ 4136.715858] RIP: 0010:media_gobj_destroy.part.16+0x1f/0x60 kernel: [ 4136.715863] Code: ff 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 55 48 89 fe 48 89 e5 53 48 89 fb 48 c7 c7 00 7f cf b0 e8 24 fa ff ff 48 8b 03 <48> 83 80 a0 00 00 00 01 48 8b 43 18 48 8b 53 10 48 89 42 08 48 89 kernel: [ 4136.715866] RSP: 0018:ffff9b2248fe3cb0 EFLAGS: 00010246 kernel: [ 4136.715870] RAX: bcf2bfbfa0d63c2f RBX: ffff88c3eb37e9c0 RCX: 00000000802a0018 kernel: [ 4136.715873] RDX: ffff88c3e4f6a078 RSI: ffff88c3eb37e9c0 RDI: ffffffffb0cf7f00 kernel: [ 4136.715876] RBP: ffff9b2248fe3cb8 R08: 0000000001000002 R09: ffffffffb0492b00 kernel: [ 4136.715879] R10: ffff9b2248fe3c28 R11: 0000000000000001 R12: 0000000000000038 kernel: [ 4136.715881] R13: ffffffffc09a1628 R14: ffff88c3e4f6a028 R15: fffffffffffffff2 kernel: [ 4136.715885] FS: 00007f8389647740(0000) GS:ffff88c465500000(0000) knlGS:0000000000000000 kernel: [ 4136.715888] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kernel: [ 4136.715891] CR2: 000055d008f80fd8 CR3: 00000001996ec005 CR4: 00000000000606e0 kernel: [ 4136.715894] Call Trace: kernel: [ 4136.715903] media_gobj_destroy+0x14/0x20 kernel: [ 4136.715908] __media_device_unregister_entity+0xb3/0xe0 kernel: [ 4136.715915] media_device_unregister_entity+0x30/0x40 kernel: [ 4136.715920] v4l2_device_unregister_subdev+0xa8/0xe0 kernel: [ 4136.715928] vimc_ent_sd_unregister+0x1e/0x30 [vimc] kernel: [ 4136.715933] vimc_sen_rm+0x16/0x20 [vimc] kernel: [ 4136.715938] vimc_remove+0x3e/0xa0 [vimc] kernel: [ 4136.715945] platform_drv_remove+0x25/0x50 kernel: [ 4136.715951] device_release_driver_internal+0xe0/0x1b0 kernel: [ 4136.715956] device_driver_detach+0x14/0x20 kernel: [ 4136.715960] unbind_store+0xd1/0x130 kernel: [ 4136.715965] drv_attr_store+0x27/0x40 kernel: [ 4136.715971] sysfs_kf_write+0x48/0x60 kernel: [ 4136.715976] kernfs_fop_write+0x128/0x1b0 kernel: [ 4136.715982] __vfs_write+0x1b/0x40 kernel: [ 4136.715987] vfs_write+0xc3/0x1d0 kernel: [ 4136.715993] ksys_write+0xaa/0xe0 kernel: [ 4136.715999] __x64_sys_write+0x1a/0x20 kernel: [ 4136.716005] do_syscall_64+0x5a/0x130 kernel: [ 4136.716010] entry_SYSCALL_64_after_hwframe+0x4 Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Acked-by: Helen Koike <helen.koike@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.