diff options
| author | Hans Verkuil <hverkuil@xs4all.nl> | 2010-12-31 11:47:23 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-01-19 11:52:13 -0200 |
| commit | 46b633779b299c7fb3d78f153a5034055f99cd45 (patch) | |
| tree | 45db9a1313d43a9438f105f3d257cc592cf050a6 | |
| parent | 6ce3ced4f73e3f0c345f47dc99fd21f2248724a8 (diff) | |
| download | op-kernel-dev-46b633779b299c7fb3d78f153a5034055f99cd45.zip op-kernel-dev-46b633779b299c7fb3d78f153a5034055f99cd45.tar.gz | |
[media] v4l2-dev: don't memset video_device.dev
Zeroing video_device.dev causes a memory leak if video_set_drvdata
was called before video_register_device was called. video_set_drvdata
calls dev_set_drvdata which allocates video_device.dev.p.
memsetting this will prevent freeing of that memory.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/v4l2-dev.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index 359e232..341764a 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -419,6 +419,10 @@ static int get_index(struct video_device *vdev) * The registration code assigns minor numbers and device node numbers * based on the requested type and registers the new device node with * the kernel. + * + * This function assumes that struct video_device was zeroed when it + * was allocated and does not contain any stale date. + * * An error is returned if no free minor or device node number could be * found, or if the registration of the device node failed. * @@ -440,7 +444,6 @@ static int __video_register_device(struct video_device *vdev, int type, int nr, int minor_offset = 0; int minor_cnt = VIDEO_NUM_DEVICES; const char *name_base; - void *priv = vdev->dev.p; /* A minor value of -1 marks this video device as never having been registered */ @@ -559,10 +562,6 @@ static int __video_register_device(struct video_device *vdev, int type, int nr, } /* Part 4: register the device with sysfs */ - memset(&vdev->dev, 0, sizeof(vdev->dev)); - /* The memset above cleared the device's device_private, so - put back the copy we made earlier. */ - vdev->dev.p = priv; vdev->dev.class = &video_class; vdev->dev.devt = MKDEV(VIDEO_MAJOR, vdev->minor); if (vdev->parent) |
