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>

9 files changed, 20 insertions, 55 deletions

diff --git a/drivers/media/video/bt8xx/bttv-gpio.c b/drivers/media/video/bt8xx/bttv-gpio.c
index 84154c26f9c5..dce6dae5740e 100644
--- a/drivers/media/video/bt8xx/bttv-gpio.c
+++ b/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);
         }
diff --git a/drivers/media/video/cx23885/cx23885-core.c b/drivers/media/video/cx23885/cx23885-core.c
index 4d0614093ad6..af16505bd2e0 100644
--- a/drivers/media/video/cx23885/cx23885-core.c
+++ b/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;
 }
diff --git a/drivers/media/video/dpc7146.c b/drivers/media/video/dpc7146.c
index 0fcc935828f8..255dae303708 100644
--- a/drivers/media/video/dpc7146.c
+++ b/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 ) {
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index e4fba9068336..b8d5327c438d 100644
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/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;
diff --git a/drivers/media/video/mxb.c b/drivers/media/video/mxb.c
index 152cc6b3e152..98ad3092a079 100644
--- a/drivers/media/video/mxb.c
+++ b/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 )
diff --git a/drivers/media/video/tvmixer.c b/drivers/media/video/tvmixer.c
index 544a4ae7d2ed..9fa5b702e073 100644
--- a/drivers/media/video/tvmixer.c
+++ b/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;
 }
 
diff --git a/drivers/media/video/v4l2-int-device.c b/drivers/media/video/v4l2-int-device.c
index f497c9458344..8b4ef530a3a8 100644
--- a/drivers/media/video/v4l2-int-device.c
+++ b/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;
 
diff --git a/drivers/media/video/videobuf-core.c b/drivers/media/video/videobuf-core.c
index 25a98496e3db..c606332512b6 100644
--- a/drivers/media/video/videobuf-core.c
+++ b/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);
 
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);