[media] davinci_vpfe: Revert "staging: media: davinci_vpfe: remove,unnecessary ret variable"

This reverts commit afa5d19a2b5f ("staging: media: davinci_vpfe: remove
unnecessary ret variable").

This patch is completely bogus and messed up the code big time.

I'm not sure what was intended, but this isn't it.

Cc: Thaissa Falbo <thaissa.falbo@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 34 insertions, 20 deletions

diff --git a/drivers/staging/media/davinci_vpfe/vpfe_video.c b/drivers/staging/media/davinci_vpfe/vpfe_video.c
index b793c04028a3..be72a8e5f221 100644
--- a/drivers/staging/media/davinci_vpfe/vpfe_video.c
+++ b/drivers/staging/media/davinci_vpfe/vpfe_video.c
@@ -172,9 +172,11 @@ static int vpfe_prepare_pipeline(struct vpfe_video_device *video)
 static int vpfe_update_pipe_state(struct vpfe_video_device *video)
 {
         struct vpfe_pipeline *pipe = &video->pipe;
+        int ret;
 
-        if (vpfe_prepare_pipeline(video))
-                return vpfe_prepare_pipeline(video);
+        ret = vpfe_prepare_pipeline(video);
+        if (ret)
+                return ret;
 
         /*
          * Find out if there is any input video
@@ -182,9 +184,10 @@ static int vpfe_update_pipe_state(struct vpfe_video_device *video)
          */
         if (pipe->input_num == 0) {
                 pipe->state = VPFE_PIPELINE_STREAM_CONTINUOUS;
-                if (vpfe_update_current_ext_subdev(video)) {
+                ret = vpfe_update_current_ext_subdev(video);
+                if (ret) {
                         pr_err("Invalid external subdev\n");
-                        return vpfe_update_current_ext_subdev(video);
+                        return ret;
                 }
         } else {
                 pipe->state = VPFE_PIPELINE_STREAM_SINGLESHOT;
@@ -667,6 +670,7 @@ static int vpfe_enum_fmt(struct file *file, void  *priv,
         struct v4l2_subdev *subdev;
         struct v4l2_format format;
         struct media_pad *remote;
+        int ret;
 
         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_enum_fmt\n");
 
@@ -695,10 +699,11 @@ static int vpfe_enum_fmt(struct file *file, void  *priv,
         sd_fmt.pad = remote->index;
         sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
         /* get output format of remote subdev */
-        if (v4l2_subdev_call(subdev, pad, get_fmt, NULL, &sd_fmt)) {
+        ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &sd_fmt);
+        if (ret) {
                 v4l2_err(&vpfe_dev->v4l2_dev,
                          "invalid remote subdev for video node\n");
-                return v4l2_subdev_call(subdev, pad, get_fmt, NULL, &sd_fmt);
+                return ret;
         }
         /* convert to pix format */
         mbus.code = sd_fmt.format.code;
@@ -725,6 +730,7 @@ static int vpfe_s_fmt(struct file *file, void *priv,
         struct vpfe_video_device *video = video_drvdata(file);
         struct vpfe_device *vpfe_dev = video->vpfe_dev;
         struct v4l2_format format;
+        int ret;
 
         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_fmt\n");
         /* If streaming is started, return error */
@@ -733,8 +739,9 @@ static int vpfe_s_fmt(struct file *file, void *priv,
                 return -EBUSY;
         }
         /* get adjacent subdev's output pad format */
-        if (__vpfe_video_get_format(video, &format))
-                return __vpfe_video_get_format(video, &format);
+        ret = __vpfe_video_get_format(video, &format);
+        if (ret)
+                return ret;
         *fmt = format;
         video->fmt = *fmt;
         return 0;
@@ -757,11 +764,13 @@ static int vpfe_try_fmt(struct file *file, void *priv,
         struct vpfe_video_device *video = video_drvdata(file);
         struct vpfe_device *vpfe_dev = video->vpfe_dev;
         struct v4l2_format format;
+        int ret;
 
         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_try_fmt\n");
         /* get adjacent subdev's output pad format */
-        if (__vpfe_video_get_format(video, &format))
-                return __vpfe_video_get_format(video, &format);
+        ret = __vpfe_video_get_format(video, &format);
+        if (ret)
+                return ret;
 
         *fmt = format;
         return 0;
@@ -838,8 +847,9 @@ static int vpfe_s_input(struct file *file, void *priv, unsigned int index)
 
         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_input\n");
 
-        if (mutex_lock_interruptible(&video->lock))
-                return mutex_lock_interruptible(&video->lock);
+        ret = mutex_lock_interruptible(&video->lock);
+        if (ret)
+                return ret;
         /*
          * If streaming is started return device busy
          * error
@@ -940,8 +950,9 @@ static int vpfe_s_std(struct file *file, void *priv, v4l2_std_id std_id)
         v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_s_std\n");
 
         /* Call decoder driver function to set the standard */
-        if (mutex_lock_interruptible(&video->lock))
-                return mutex_lock_interruptible(&video->lock);
+        ret = mutex_lock_interruptible(&video->lock);
+        if (ret)
+                return ret;
         sdinfo = video->current_ext_subdev;
         /* If streaming is started, return device busy error */
         if (video->started) {
@@ -1327,8 +1338,9 @@ static int vpfe_reqbufs(struct file *file, void *priv,
                 return -EINVAL;
         }
 
-        if (mutex_lock_interruptible(&video->lock))
-                return mutex_lock_interruptible(&video->lock);
+        ret = mutex_lock_interruptible(&video->lock);
+        if (ret)
+                return ret;
 
         if (video->io_usrs != 0) {
                 v4l2_err(&vpfe_dev->v4l2_dev, "Only one IO user allowed\n");
@@ -1354,10 +1366,11 @@ static int vpfe_reqbufs(struct file *file, void *priv,
         q->buf_struct_size = sizeof(struct vpfe_cap_buffer);
         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 
-        if (vb2_queue_init(q)) {
+        ret = vb2_queue_init(q);
+        if (ret) {
                 v4l2_err(&vpfe_dev->v4l2_dev, "vb2_queue_init() failed\n");
                 vb2_dma_contig_cleanup_ctx(vpfe_dev->pdev);
-                return vb2_queue_init(q);
+                return ret;
         }
 
         fh->io_allowed = 1;
@@ -1533,8 +1546,9 @@ static int vpfe_streamoff(struct file *file, void *priv,
                 return -EINVAL;
         }
 
-        if (mutex_lock_interruptible(&video->lock))
-                return mutex_lock_interruptible(&video->lock);
+        ret = mutex_lock_interruptible(&video->lock);
+        if (ret)
+                return ret;
 
         vpfe_stop_capture(video);
         ret = vb2_streamoff(&video->buffer_queue, buf_type);