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>

drivers/media/video/bt8xx/bttv-gpio.c

@@ -106,11 +106,9 @@ int bttv_sub_add_device(struct bttv_core *core, char *name)
 
 int bttv_sub_del_devices(struct bttv_core *core)
 {
-	struct bttv_sub_device *sub;
-	struct list_head *item,*save;
+	struct bttv_sub_device *sub, *save;
 
-	list_for_each_safe(item,save,&core->subs) {
-		sub = list_entry(item,struct bttv_sub_device,list);
+	list_for_each_entry_safe(sub, save, &core->subs, list) {
 		list_del(&sub->list);
 		device_unregister(&sub->dev);
 	}

drivers/media/video/cx23885/cx23885-core.c

@@ -1100,7 +1100,6 @@ static int cx23885_restart_queue(struct cx23885_tsport *port,
 {
 	struct cx23885_dev *dev = port->dev;
 	struct cx23885_buffer *buf;
-	struct list_head *item;
 
 	dprintk(5, "%s()\n", __FUNCTION__);
 	if (list_empty(&q->active))
@@ -1148,10 +1147,8 @@ static int cx23885_restart_queue(struct cx23885_tsport *port,
 	dprintk(2, "restart_queue [%p/%d]: restart dma\n",
 		buf, buf->vb.i);
 	cx23885_start_dma(port, q, buf);
-	list_for_each(item, &q->active) {
-		buf = list_entry(item, struct cx23885_buffer, vb.queue);
+	list_for_each_entry(buf, &q->active, vb.queue)
 		buf->count = q->count++;
-	}
 	mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
 	return 0;
 }

drivers/media/video/dpc7146.c

@@ -92,7 +92,6 @@ static int dpc_probe(struct saa7146_dev* dev)
 {
 	struct dpc* dpc = NULL;
 	struct i2c_client *client;
-	struct list_head *item;
 
 	dpc = kzalloc(sizeof(struct dpc), GFP_KERNEL);
 	if( NULL == dpc ) {
@@ -116,11 +115,9 @@ static int dpc_probe(struct saa7146_dev* dev)
 	}
 
 	/* loop through all i2c-devices on the bus and look who is there */
-	list_for_each(item,&dpc->i2c_adapter.clients) {
-		client = list_entry(item, struct i2c_client, list);
+	list_for_each_entry(client, &dpc->i2c_adapter.clients, list)
 		if( I2C_SAA7111A == client->addr )
 			dpc->saa7111a = client;
-	}
 
 	/* check if all devices are present */
 	if( 0 == dpc->saa7111a ) {

drivers/media/video/em28xx/em28xx-video.c

@@ -252,10 +252,8 @@ static int em28xx_v4l2_open(struct inode *inode, struct file *filp)
 	int minor = iminor(inode);
 	int errCode = 0;
 	struct em28xx *h,*dev = NULL;
-	struct list_head *list;
 
-	list_for_each(list,&em28xx_devlist) {
-		h = list_entry(list, struct em28xx, devlist);
+	list_for_each_entry(h, &em28xx_devlist, devlist) {
 		if (h->vdev->minor == minor) {
 			dev  = h;
 			dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;

drivers/media/video/mxb.c

@@ -153,7 +153,6 @@ static int mxb_probe(struct saa7146_dev* dev)
 {
 	struct mxb* mxb = NULL;
 	struct i2c_client *client;
-	struct list_head *item;
 	int result;
 
 	if ((result = request_module("saa7111")) < 0) {
@@ -196,8 +195,7 @@ static int mxb_probe(struct saa7146_dev* dev)
 	}
 
 	/* loop through all i2c-devices on the bus and look who is there */
-	list_for_each(item,&mxb->i2c_adapter.clients) {
-		client = list_entry(item, struct i2c_client, list);
+	list_for_each_entry(client, &mxb->i2c_adapter.clients, list) {
 		if( I2C_ADDR_TEA6420_1 == client->addr )
 			mxb->tea6420_1 = client;
 		if( I2C_ADDR_TEA6420_2 == client->addr )

drivers/media/video/tvmixer.c

@@ -237,13 +237,10 @@ static const struct file_operations tvmixer_fops = {
 
 static int tvmixer_adapters(struct i2c_adapter *adap)
 {
-	struct list_head  *item;
 	struct i2c_client *client;
 
-	list_for_each(item,&adap->clients) {
-		client = list_entry(item, struct i2c_client, list);
+	list_for_each_entry(client, &adap->clients, list)
 		tvmixer_clients(client);
-	}
 	return 0;
 }
 

drivers/media/video/v4l2-int-device.c

@@ -34,21 +34,13 @@ static LIST_HEAD(int_list);
 
 static void v4l2_int_device_try_attach_all(void)
 {
-	struct list_head *head_master;
-
-	list_for_each(head_master, &int_list) {
-		struct list_head *head_slave;
-		struct v4l2_int_device *m =
-			list_entry(head_master, struct v4l2_int_device, head);
+	struct v4l2_int_device *m, *s;
 
+	list_for_each_entry(m, &int_list, head) {
 		if (m->type != v4l2_int_type_master)
 			continue;
 
-		list_for_each(head_slave, &int_list) {
-			struct v4l2_int_device *s =
-				list_entry(head_slave,
-					   struct v4l2_int_device, head);
-
+		list_for_each_entry(s, &int_list, head) {
 			if (s->type != v4l2_int_type_slave)
 				continue;
 

drivers/media/video/videobuf-core.c

@@ -517,7 +517,6 @@ int videobuf_dqbuf(struct videobuf_queue *q,
 int videobuf_streamon(struct videobuf_queue *q)
 {
 	struct videobuf_buffer *buf;
-	struct list_head *list;
 	unsigned long flags=0;
 	int retval;
 
@@ -531,11 +530,9 @@ int videobuf_streamon(struct videobuf_queue *q)
 	q->streaming = 1;
 	if (q->irqlock)
 		spin_lock_irqsave(q->irqlock,flags);
-	list_for_each(list,&q->stream) {
-		buf = list_entry(list, struct videobuf_buffer, stream);
+	list_for_each_entry(buf, &q->stream, stream)
 		if (buf->state == STATE_PREPARED)
 			q->ops->buf_queue(q,buf);
-	}
 	if (q->irqlock)
 		spin_unlock_irqrestore(q->irqlock,flags);
 

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)
+	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);