[media] media: i.MX27 camera: Use list_first_entry() whenever possible

Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
[g.liakhovetski@gmx.de: fix one list_first_entry() instance]
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
index 32a9d76d69c84bf9e97c98629262c656cd5a606a..2d1941435786b91829d91bee34bae99d7ee1bcb0 100644 (file)
--- a/drivers/media/video/mx2_camera.c
+++ b/drivers/media/video/mx2_camera.c
@@ -449,7 +449,7 @@ static void mx25_camera_frame_done(struct mx2_camera_dev *pcdev, int fb,
                buf = NULL;
                writel(0, pcdev->base_csi + fb_reg);
        } else {
-               buf = list_entry(pcdev->capture.next, struct mx2_buffer,
+               buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
                                queue);
                vb = &buf->vb;
                list_del(&buf->queue);
@@ -709,8 +709,8 @@ static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
 
                spin_lock_irqsave(&pcdev->lock, flags);
 
-               buf = list_entry(pcdev->capture.next,
-                                struct mx2_buffer, queue);
+               buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
+                                      queue);
                buf->bufnum = 0;
                vb = &buf->vb;
                buf->state = MX2_STATE_ACTIVE;
@@ -719,8 +719,8 @@ static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
                mx27_update_emma_buf(pcdev, phys, buf->bufnum);
                list_move_tail(pcdev->capture.next, &pcdev->active_bufs);
 
-               buf = list_entry(pcdev->capture.next,
-                                struct mx2_buffer, queue);
+               buf = list_first_entry(&pcdev->capture, struct mx2_buffer,
+                                      queue);
                buf->bufnum = 1;
                vb = &buf->vb;
                buf->state = MX2_STATE_ACTIVE;
@@ -1205,8 +1205,7 @@ static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev,
        struct vb2_buffer *vb;
        unsigned long phys;
 
-       buf = list_entry(pcdev->active_bufs.next,
-                        struct mx2_buffer, queue);
+       buf = list_first_entry(&pcdev->active_bufs, struct mx2_buffer, queue);
 
        BUG_ON(buf->bufnum != bufnum);
 
@@ -1260,8 +1259,8 @@ static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev,
                        return;
                }
 
-               buf = list_entry(pcdev->discard.next,
-                       struct mx2_buffer, queue);
+               buf = list_first_entry(&pcdev->discard, struct mx2_buffer,
+                                      queue);
                buf->bufnum = bufnum;
 
                list_move_tail(pcdev->discard.next, &pcdev->active_bufs);
@@ -1269,8 +1268,7 @@ static void mx27_camera_frame_done_emma(struct mx2_camera_dev *pcdev,
                return;
        }
 
-       buf = list_entry(pcdev->capture.next,
-                       struct mx2_buffer, queue);
+       buf = list_first_entry(&pcdev->capture, struct mx2_buffer, queue);
 
        buf->bufnum = bufnum;
 
@@ -1304,7 +1302,7 @@ static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data)
                       pcdev->base_emma + PRP_CNTL);
                writel(cntl, pcdev->base_emma + PRP_CNTL);
 
-               buf = list_entry(pcdev->active_bufs.next,
+               buf = list_first_entry(&pcdev->active_bufs,
                        struct mx2_buffer, queue);
                mx27_camera_frame_done_emma(pcdev,
                                        buf->bufnum, true);
@@ -1316,8 +1314,8 @@ static irqreturn_t mx27_camera_emma_irq(int irq_emma, void *data)
                 * Both buffers have triggered, process the one we're expecting
                 * to first
                 */
-               buf = list_entry(pcdev->active_bufs.next,
-                       struct mx2_buffer, queue);
+               buf = list_first_entry(&pcdev->active_bufs, struct mx2_buffer,
+                                      queue);
                mx27_camera_frame_done_emma(pcdev, buf->bufnum, false);
                status &= ~(1 << (6 - buf->bufnum)); /* mark processed */
        } else if ((status & (1 << 6)) || (status & (1 << 4))) {