V4L/DVB (6316): Change list_for_each+list_entry to list_for_each_entry

The rest of V4L files.

There is one list_for_each+list_entry in cpia_pp.c that
wasn't changed because it expects the loop iterator to remain NULL if
the list is empty.

A bug in vivi is fixed; the 'safe' version needs to be used because the loop
deletes the list entries.

Simplify a second loop in vivi and get rid if an un-used variable in that loop.

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

1 files changed, 9 insertions, 18 deletions

diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c
index 61a6608d6e61..b532aa280a1b 100644
--- a/drivers/media/video/vivi.c
+++ b/drivers/media/video/vivi.c
@@ -507,7 +507,6 @@ static void vivi_stop_thread(struct vivi_dmaqueue  *dma_q)
 static int restart_video_queue(struct vivi_dmaqueue *dma_q)
 {
         struct vivi_buffer *buf, *prev;
-        struct list_head *item;
 
         dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
 
@@ -521,9 +520,7 @@ static int restart_video_queue(struct vivi_dmaqueue *dma_q)
 //              vivi_start_thread(dma_q);
 
                 /* cancel all outstanding capture / vbi requests */
-                list_for_each(item,&dma_q->active) {
-                        buf = list_entry(item, struct vivi_buffer, vb.queue);
-
+                list_for_each_entry_safe(buf, prev, &dma_q->active, vb.queue) {
                         list_del(&buf->vb.queue);
                         buf->vb.state = STATE_ERROR;
                         wake_up(&buf->vb.done);
@@ -982,31 +979,25 @@ static int vidioc_s_ctrl (struct file *file, void *priv,
 static int vivi_open(struct inode *inode, struct file *file)
 {
         int minor = iminor(inode);
-        struct vivi_dev *h,*dev = NULL;
+        struct vivi_dev *dev;
         struct vivi_fh *fh;
-        struct list_head *list;
-        enum v4l2_buf_type type = 0;
         int i;
 
         printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
 
-        list_for_each(list,&vivi_devlist) {
-                h = list_entry(list, struct vivi_dev, vivi_devlist);
-                if (h->vfd.minor == minor) {
-                        dev  = h;
-                        type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-                }
-        }
-        if (NULL == dev)
-                return -ENODEV;
+        list_for_each_entry(dev, &vivi_devlist, vivi_devlist)
+                if (dev->vfd.minor == minor)
+                        goto found;
+        return -ENODEV;
+found:
 
 
 
         /* If more than one user, mutex should be added */
         dev->users++;
 
-        dprintk(1,"open minor=%d type=%s users=%d\n",
-                                minor,v4l2_type_names[type],dev->users);
+        dprintk(1, "open minor=%d type=%s users=%d\n", minor,
+                v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users);
 
         /* allocate + initialize per filehandle data */
         fh = kzalloc(sizeof(*fh),GFP_KERNEL);