diff options
| author | Ezequiel Garcia <ezequiel@collabora.com> | 2021-01-04 23:34:39 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-01-12 20:06:03 +0300 |
| commit | bb2216548a2b13cf2942a058b475438a7a6bb028 (patch) | |
| tree | eaa0a8c22d055277f583c3a764953b1f9461779c /drivers/staging/media | |
| parent | b9dbfebb18ef2def4966eb6d10a04d0cf83d29a3 (diff) | |
| download | linux-bb2216548a2b13cf2942a058b475438a7a6bb028.tar.xz | |
media: imx: Unregister csc/scaler only if registered
The csc/scaler device pointer (imxmd->m2m_vdev) is assigned
after the imx media device v4l2-async probe completes,
therefore we need to check if the device is non-NULL
before trying to unregister it.
This can be the case if the non-completed imx media device
is unbinded (or the driver is removed), leading to a kernel oops.
Fixes: a8ef0488cc59 ("media: imx: add csc/scaler mem2mem device")
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/staging/media')
| -rw-r--r-- | drivers/staging/media/imx/imx-media-dev.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/staging/media/imx/imx-media-dev.c b/drivers/staging/media/imx/imx-media-dev.c index 6d2205461e56..338b8bd0bb07 100644 --- a/drivers/staging/media/imx/imx-media-dev.c +++ b/drivers/staging/media/imx/imx-media-dev.c @@ -53,6 +53,7 @@ static int imx6_media_probe_complete(struct v4l2_async_notifier *notifier) imxmd->m2m_vdev = imx_media_csc_scaler_device_init(imxmd); if (IS_ERR(imxmd->m2m_vdev)) { ret = PTR_ERR(imxmd->m2m_vdev); + imxmd->m2m_vdev = NULL; goto unlock; } @@ -107,10 +108,14 @@ static int imx_media_remove(struct platform_device *pdev) v4l2_info(&imxmd->v4l2_dev, "Removing imx-media\n"); + if (imxmd->m2m_vdev) { + imx_media_csc_scaler_device_unregister(imxmd->m2m_vdev); + imxmd->m2m_vdev = NULL; + } + v4l2_async_notifier_unregister(&imxmd->notifier); imx_media_unregister_ipu_internal_subdevs(imxmd); v4l2_async_notifier_cleanup(&imxmd->notifier); - imx_media_csc_scaler_device_unregister(imxmd->m2m_vdev); media_device_unregister(&imxmd->md); v4l2_device_unregister(&imxmd->v4l2_dev); media_device_cleanup(&imxmd->md); |