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kernel_samsung_a53x/drivers/media/platform
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Bryan O'Donoghue 99131b864b media: qcom: camss: Fix vfe_get() error jump 
commit 26bda3da00c3edef727a6acb00ed2eb4b22f8723 upstream.

Right now it is possible to do a vfe_get() with the internal reference
count at 1. If vfe_check_clock_rates() returns non-zero then we will
leave the reference count as-is and

run:
- pm_runtime_put_sync()
- vfe->ops->pm_domain_off()

skip:
- camss_disable_clocks()

Subsequent vfe_put() calls will when the ref-count is non-zero
unconditionally run:

- pm_runtime_put_sync()
- vfe->ops->pm_domain_off()
- camss_disable_clocks()

vfe_get() should not attempt to roll-back on error when the ref-count is
non-zero as the upper layers will still do their own vfe_put() operations.

vfe_put() will drop the reference count and do the necessary power
domain release, the cleanup jumps in vfe_get() should only be run when
the ref-count is zero.

[   50.095796] CPU: 7 PID: 3075 Comm: cam Not tainted 6.3.2+ #80
[   50.095798] Hardware name: LENOVO 21BXCTO1WW/21BXCTO1WW, BIOS N3HET82W (1.54 ) 05/26/2023
[   50.095799] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   50.095802] pc : refcount_warn_saturate+0xf4/0x148
[   50.095804] lr : refcount_warn_saturate+0xf4/0x148
[   50.095805] sp : ffff80000c7cb8b0
[   50.095806] x29: ffff80000c7cb8b0 x28: ffff16ecc0e3fc10 x27: 0000000000000000
[   50.095810] x26: 0000000000000000 x25: 0000000000020802 x24: 0000000000000000
[   50.095813] x23: ffff16ecc7360640 x22: 00000000ffffffff x21: 0000000000000005
[   50.095815] x20: ffff16ed175f4400 x19: ffffb4d9852942a8 x18: ffffffffffffffff
[   50.095818] x17: ffffb4d9852d4a48 x16: ffffb4d983da5db8 x15: ffff80000c7cb320
[   50.095821] x14: 0000000000000001 x13: 2e656572662d7265 x12: 7466612d65737520
[   50.095823] x11: 00000000ffffefff x10: ffffb4d9850cebf0 x9 : ffffb4d9835cf954
[   50.095826] x8 : 0000000000017fe8 x7 : c0000000ffffefff x6 : 0000000000057fa8
[   50.095829] x5 : ffff16f813fe3d08 x4 : 0000000000000000 x3 : ffff621e8f4d2000
[   50.095832] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff16ed32119040
[   50.095835] Call trace:
[   50.095836]  refcount_warn_saturate+0xf4/0x148
[   50.095838]  device_link_put_kref+0x84/0xc8
[   50.095843]  device_link_del+0x38/0x58
[   50.095846]  vfe_pm_domain_off+0x3c/0x50 [qcom_camss]
[   50.095860]  vfe_put+0x114/0x140 [qcom_camss]
[   50.095869]  csid_set_power+0x2c8/0x408 [qcom_camss]
[   50.095878]  pipeline_pm_power_one+0x164/0x170 [videodev]
[   50.095896]  pipeline_pm_power+0xc4/0x110 [videodev]
[   50.095909]  v4l2_pipeline_pm_use+0x5c/0xa0 [videodev]
[   50.095923]  v4l2_pipeline_pm_get+0x1c/0x30 [videodev]
[   50.095937]  video_open+0x7c/0x100 [qcom_camss]
[   50.095945]  v4l2_open+0x84/0x130 [videodev]
[   50.095960]  chrdev_open+0xc8/0x250
[   50.095964]  do_dentry_open+0x1bc/0x498
[   50.095966]  vfs_open+0x34/0x40
[   50.095968]  path_openat+0xb44/0xf20
[   50.095971]  do_filp_open+0xa4/0x160
[   50.095974]  do_sys_openat2+0xc8/0x188
[   50.095975]  __arm64_sys_openat+0x6c/0xb8
[   50.095977]  invoke_syscall+0x50/0x128
[   50.095982]  el0_svc_common.constprop.0+0x4c/0x100
[   50.095985]  do_el0_svc+0x40/0xa8
[   50.095988]  el0_svc+0x2c/0x88
[   50.095991]  el0t_64_sync_handler+0xf4/0x120
[   50.095994]  el0t_64_sync+0x190/0x198
[   50.095996] ---[ end trace 0000000000000000 ]---

Fixes: 779096916dae ("media: camss: vfe: Fix runtime PM imbalance on error")
Cc: stable@vger.kernel.org
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-11-18 11:43:31 +01:00
..
am437x Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
atmel Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cadence Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
coda Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
davinci Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
exynos mfc: Reduce QoS boosting from Samsung hacks 2024-11-17 17:43:58 +01:00
exynos-gsc Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
exynos4-is Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
marvell-ccic Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mtk-jpeg media: mtk-jpeg: Fix use after free bug due to uncanceled work 2024-11-08 11:25:47 +01:00
mtk-mdp Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mtk-vcodec Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
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omap Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
omap3isp Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
qcom media: qcom: camss: Fix vfe_get() error jump 2024-11-18 11:43:31 +01:00
rcar-vin Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rockchip/rga Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
s3c-camif media: s3c-camif: Avoid inappropriate kfree() 2024-11-18 11:43:07 +01:00
s5p-g2d Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
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xilinx Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
aspeed-video.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
fsl-viu.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
imx-pxp.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
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Kconfig Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
m2m-deinterlace.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mx2_emmaprp.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pxa_camera.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rcar-fcp.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rcar_drif.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rcar_fdp1.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rcar_jpu.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
renesas-ceu.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sh_vou.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
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via-camera.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
video-mux.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00