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| author | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2019-03-01 14:11:27 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-03-19 20:29:37 +0300 |
| commit | 218bf10e39ed5fb22a48dee40bfd2bbcb91693ba (patch) | |
| tree | fae09b667509e0ed99447119c42b359186350360 /include/media/v4l2-subdev.h | |
| parent | 0e43734d4c46e156785bb1d2acc5b3c10b7d5dd5 (diff) | |
| download | linux-218bf10e39ed5fb22a48dee40bfd2bbcb91693ba.tar.xz | |
media: v4l2-subdev: handle module refcounting here
The module ownership refcounting was done in media_entity_get/put,
but that was very confusing and it did not work either in case an
application had a v4l-subdevX device open and the module was
unbound. When the v4l-subdevX device was closed the media_entity_put
was never called and the module refcount was left one too high, making
it impossible to unload it.
Since v4l2-subdev.c was the only place where media_entity_get/put was
called, just move the functionality to v4l2-subdev.c and drop those
confusing entity functions.
Store the module in subdev_fh so module_put no longer depends on
the media_entity struct.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'include/media/v4l2-subdev.h')
| -rw-r--r-- | include/media/v4l2-subdev.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index e807aa96ed3b..a7fa5b80915a 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -910,9 +910,11 @@ struct v4l2_subdev { * * @vfh: pointer to &struct v4l2_fh * @pad: pointer to &struct v4l2_subdev_pad_config + * @owner: module pointer to the owner of this file handle */ struct v4l2_subdev_fh { struct v4l2_fh vfh; + struct module *owner; #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) struct v4l2_subdev_pad_config *pad; #endif |