V4L/DVB (6314): saa7134: Replace list_for_each+list_entry with list_for_each_entry

A couple loops weren't changed because they expected the loop iterator
to be left as NULL if the list was empty.  Maybe the code should just
check for that first, then loop?

Adjust some of the loop logic to be simpler.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 15 insertions, 27 deletions

diff --git a/drivers/media/video/saa7134/saa7134-oss.c b/drivers/media/video/saa7134/saa7134-oss.c
index 1a737b647366..aedf04653e0e 100644
--- a/drivers/media/video/saa7134/saa7134-oss.c
+++ b/drivers/media/video/saa7134/saa7134-oss.c
@@ -239,17 +239,14 @@ static int dsp_rec_stop(struct saa7134_dev *dev)
 static int dsp_open(struct inode *inode, struct file *file)
 {
 	int minor = iminor(inode);
-	struct saa7134_dev *h,*dev = NULL;
-	struct list_head *list;
+	struct saa7134_dev *dev;
 	int err;
 
-	list_for_each(list,&saa7134_devlist) {
-		h = list_entry(list, struct saa7134_dev, devlist);
-		if (h->dmasound.minor_dsp == minor)
-			dev = h;
-	}
-	if (NULL == dev)
-		return -ENODEV;
+	list_for_each_entry(dev, &saa7134_devlist, devlist)
+		if (dev->dmasound.minor_dsp == minor)
+			goto found;
+	return -ENODEV;
+ found:
 
 	mutex_lock(&dev->dmasound.lock);
 	err = -EBUSY;
@@ -680,19 +677,14 @@ mixer_level(struct saa7134_dev *dev, enum saa7134_audio_in src, int level)
 static int mixer_open(struct inode *inode, struct file *file)
 {
 	int minor = iminor(inode);
-	struct saa7134_dev *h,*dev = NULL;
-	struct list_head *list;
+	struct saa7134_dev *dev;
 
-	list_for_each(list,&saa7134_devlist) {
-		h = list_entry(list, struct saa7134_dev, devlist);
-		if (h->dmasound.minor_mixer == minor)
-			dev = h;
-	}
-	if (NULL == dev)
-		return -ENODEV;
-
-	file->private_data = dev;
-	return 0;
+	list_for_each_entry(dev, &saa7134_devlist, devlist)
+		if (dev->dmasound.minor_mixer == minor) {
+			file->private_data = dev;
+			return 0;
+		}
+	return -ENODEV;
 }
 
 static int mixer_release(struct inode *inode, struct file *file)
@@ -1022,18 +1014,14 @@ static int saa7134_oss_init(void)
 
 static void saa7134_oss_exit(void)
 {
-	struct saa7134_dev *dev = NULL;
-	struct list_head *list;
-
-	list_for_each(list,&saa7134_devlist) {
-		dev = list_entry(list, struct saa7134_dev, devlist);
+	struct saa7134_dev *dev;
 
+	list_for_each_entry(dev, &saa7134_devlist, devlist) {
 		/* Device isn't registered by OSS, probably ALSA's */
 		if (!dev->dmasound.minor_dsp)
 			continue;
 
 		oss_device_exit(dev);
-
 	}
 
 	saa7134_dmasound_init = NULL;