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authorMarek Szyprowski <m.szyprowski@samsung.com>2013-12-03 10:14:29 -0300
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-01-27 21:42:42 -0200
commit6c3df5da67f1f53df78c7e20cd53a481dc28eade (patch)
treee5b9351c72f9622fa1f713504161f6110e9e6dac /drivers/media
parent587d1b06e07b4a079453c74ba9edf17d21931049 (diff)
downloadlinux-6c3df5da67f1f53df78c7e20cd53a481dc28eade.tar.bz2
[media] media: v4l2-dev: fix video device index assignment
The side effect of commit 1056e4388b045 ("v4l2-dev: Fix race condition on __video_register_device") is the increased number of index value assigned on video_device registration. Before that commit video_devices were numbered from 0, after it, the indexes starts from 1, because get_index() always count the device, which is being registered. Some device drivers rely on video_device index number for internal purposes, i.e. s5p-mfc driver stopped working after that patch. This patch restores the old method of numbering the video_device indexes. Cc: stable@vger.kernel.org # for v3.12 Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Acked-by: Ricardo Ribalda <ricardo.ribalda@gmail.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/v4l2-core/v4l2-dev.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c
index b5aaaac427ad..0a30dbf3d05c 100644
--- a/drivers/media/v4l2-core/v4l2-dev.c
+++ b/drivers/media/v4l2-core/v4l2-dev.c
@@ -872,8 +872,8 @@ int __video_register_device(struct video_device *vdev, int type, int nr,
/* Should not happen since we thought this minor was free */
WARN_ON(video_device[vdev->minor] != NULL);
- video_device[vdev->minor] = vdev;
vdev->index = get_index(vdev);
+ video_device[vdev->minor] = vdev;
mutex_unlock(&videodev_lock);
if (vdev->ioctl_ops)