Commit 5a1a2f63 authored by Krzysztof Ha?asa's avatar Krzysztof Ha?asa Committed by Mauro Carvalho Chehab

media: tw686x: Fix oops on buffer alloc failure

The error path currently calls tw686x_video_free() which requires
vc->dev to be initialized, causing a NULL dereference on uninitizalized
channels.

Fix this by setting the vc->dev fields for all the channels first.

Fixes: f8afaa8d ("[media] tw686x: Introduce an interface to support multiple DMA modes")
Signed-off-by: default avatarKrzysztof Ha?asa <khalasa@piap.pl>
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
parent acbea679
...@@ -1190,6 +1190,14 @@ int tw686x_video_init(struct tw686x_dev *dev) ...@@ -1190,6 +1190,14 @@ int tw686x_video_init(struct tw686x_dev *dev)
return err; return err;
} }
/* Initialize vc->dev and vc->ch for the error path */
for (ch = 0; ch < max_channels(dev); ch++) {
struct tw686x_video_channel *vc = &dev->video_channels[ch];
vc->dev = dev;
vc->ch = ch;
}
for (ch = 0; ch < max_channels(dev); ch++) { for (ch = 0; ch < max_channels(dev); ch++) {
struct tw686x_video_channel *vc = &dev->video_channels[ch]; struct tw686x_video_channel *vc = &dev->video_channels[ch];
struct video_device *vdev; struct video_device *vdev;
...@@ -1198,9 +1206,6 @@ int tw686x_video_init(struct tw686x_dev *dev) ...@@ -1198,9 +1206,6 @@ int tw686x_video_init(struct tw686x_dev *dev)
spin_lock_init(&vc->qlock); spin_lock_init(&vc->qlock);
INIT_LIST_HEAD(&vc->vidq_queued); INIT_LIST_HEAD(&vc->vidq_queued);
vc->dev = dev;
vc->ch = ch;
/* default settings */ /* default settings */
err = tw686x_set_standard(vc, V4L2_STD_NTSC); err = tw686x_set_standard(vc, V4L2_STD_NTSC);
if (err) if (err)
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment