diff options
| author | Yunfei Dong <yunfei.dong@mediatek.com> | 2022-05-12 05:19:50 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2022-05-13 15:53:20 +0300 |
| commit | c10c0086db688c95bb4e0e378e523818dff1551d (patch) | |
| tree | 92846c325e683b646d6d3700a6d60cfc3525f7a2 /drivers/media | |
| parent | 5d418351ca8f17defa1170d968df161c35b810e3 (diff) | |
| download | linux-c10c0086db688c95bb4e0e378e523818dff1551d.tar.xz | |
media: mediatek: vcodec: prevent kernel crash when rmmod mtk-vcodec-dec.ko
If the driver support subdev mode, the parameter "dev->pm.dev" will be
NULL in mtk_vcodec_dec_remove. Kernel will crash when try to rmmod
mtk-vcodec-dec.ko.
[ 4380.702726] pc : do_raw_spin_trylock+0x4/0x80
[ 4380.707075] lr : _raw_spin_lock_irq+0x90/0x14c
[ 4380.711509] sp : ffff80000819bc10
[ 4380.714811] x29: ffff80000819bc10 x28: ffff3600c03e4000 x27: 0000000000000000
[ 4380.721934] x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000
[ 4380.729057] x23: ffff3600c0f34930 x22: ffffd5e923549000 x21: 0000000000000220
[ 4380.736179] x20: 0000000000000208 x19: ffffd5e9213e8ebc x18: 0000000000000020
[ 4380.743298] x17: 0000002000000000 x16: ffffd5e9213e8e90 x15: 696c346f65646976
[ 4380.750420] x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000040
[ 4380.757542] x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000
[ 4380.764664] x8 : 0000000000000000 x7 : ffff3600c7273ae8 x6 : ffffd5e9213e8ebc
[ 4380.771786] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
[ 4380.778908] x2 : 0000000000000000 x1 : ffff3600c03e4000 x0 : 0000000000000208
[ 4380.786031] Call trace:
[ 4380.788465] do_raw_spin_trylock+0x4/0x80
[ 4380.792462] __pm_runtime_disable+0x2c/0x1b0
[ 4380.796723] mtk_vcodec_dec_remove+0x5c/0xa0 [mtk_vcodec_dec]
[ 4380.802466] platform_remove+0x2c/0x60
[ 4380.806204] __device_release_driver+0x194/0x250
[ 4380.810810] driver_detach+0xc8/0x15c
[ 4380.814462] bus_remove_driver+0x5c/0xb0
[ 4380.818375] driver_unregister+0x34/0x64
[ 4380.822288] platform_driver_unregister+0x18/0x24
[ 4380.826979] mtk_vcodec_dec_driver_exit+0x1c/0x888 [mtk_vcodec_dec]
[ 4380.833240] __arm64_sys_delete_module+0x190/0x224
[ 4380.838020] invoke_syscall+0x48/0x114
[ 4380.841760] el0_svc_common.constprop.0+0x60/0x11c
[ 4380.846540] do_el0_svc+0x28/0x90
[ 4380.849844] el0_svc+0x4c/0x100
[ 4380.852975] el0t_64_sync_handler+0xec/0xf0
[ 4380.857148] el0t_64_sync+0x190/0x194
[ 4380.860801] Code: 94431515 17ffffca d503201f d503245f (b9400004)
Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c index 5cd2409205da..42cfa674bf8a 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c @@ -485,7 +485,8 @@ static int mtk_vcodec_dec_remove(struct platform_device *pdev) video_unregister_device(dev->vfd_dec); v4l2_device_unregister(&dev->v4l2_dev); - pm_runtime_disable(dev->pm.dev); + if (!dev->vdec_pdata->is_subdev_supported) + pm_runtime_disable(dev->pm.dev); mtk_vcodec_fw_release(dev->fw_handler); return 0; } |