[PATCH 128/368] staging: cx25821: avoid NULL pointer dereference

[Greg KH]

From: Alexander Beregalov <a.beregalov at gmail.com>

Assign dev only if fh is not NULL.

Signed-off-by: Alexander Beregalov <a.beregalov at gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at suse.de>
---
 drivers/staging/cx25821/cx25821-audups11.c |    3 ++-
 drivers/staging/cx25821/cx25821-video.c    |    3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/cx25821/cx25821-audups11.c b/drivers/staging/cx25821/cx25821-audups11.c
index 89c8fe2..46c7f78 100644
--- a/drivers/staging/cx25821/cx25821-audups11.c
+++ b/drivers/staging/cx25821/cx25821-audups11.c
@@ -343,10 +343,11 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
 			 struct v4l2_control *ctl)
 {
 	struct cx25821_fh *fh = priv;
-	struct cx25821_dev *dev = fh->dev;
+	struct cx25821_dev *dev;
 	int err;
 
 	if (fh) {
+		dev = fh->dev;
 		err = v4l2_prio_check(&dev->prio, &fh->prio);
 		if (0 != err)
 			return err;
diff --git a/drivers/staging/cx25821/cx25821-video.c b/drivers/staging/cx25821/cx25821-video.c
index 6e710ae..8cd3986 100644
--- a/drivers/staging/cx25821/cx25821-video.c
+++ b/drivers/staging/cx25821/cx25821-video.c
@@ -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)
 {
 	struct cx25821_fh *fh = priv;
-	struct cx25821_dev *dev = fh->dev;
+	struct cx25821_dev *dev;
 	int err;
 
 	if (fh) {
+		dev = fh->dev;
 		err = v4l2_prio_check(&dev->prio, &fh->prio);
 		if (0 != err)
 			return err;
-- 
1.7.0.1