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staging: cx25821: avoid NULL pointer dereference 

Assign dev only if fh is not NULL.

Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alexander Beregalov 2010-01-07 03:21:48 +03:00 committed by Greg Kroah-Hartman
parent 267c39c918
commit c424d46fdc
2 changed files with 4 additions and 2 deletions
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3
drivers/staging/cx25821/cx25821-audups11.c
View File

@ -343,10 +343,11 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctl) struct v4l2_control *ctl)
{ {
struct cx25821_fh *fh = priv; struct cx25821_fh *fh = priv;
struct cx25821_dev *dev = fh->dev; struct cx25821_dev *dev;
int err; int err;
if (fh) { if (fh) {
dev = fh->dev;
err = v4l2_prio_check(&dev->prio, &fh->prio); err = v4l2_prio_check(&dev->prio, &fh->prio);
if (0 != err) if (0 != err)
return err; return err;

3
drivers/staging/cx25821/cx25821-video.c
View File

@ -963,10 +963,11 @@ int cx25821_set_freq(struct cx25821_dev *dev, struct v4l2_frequency *f)
int vidioc_s_frequency(struct file *file, void *priv, struct v4l2_frequency *f) int vidioc_s_frequency(struct file *file, void *priv, struct v4l2_frequency *f)
{ {
struct cx25821_fh *fh = priv; struct cx25821_fh *fh = priv;
struct cx25821_dev *dev = fh->dev; struct cx25821_dev *dev;
int err; int err;
if (fh) { if (fh) {
dev = fh->dev;
err = v4l2_prio_check(&dev->prio, &fh->prio); err = v4l2_prio_check(&dev->prio, &fh->prio);
if (0 != err) if (0 != err)
return err; return err;