[media] v4l: omap4iss: Simplify error paths

Get rid of a goto statement for a simple error path that can be inlined,
and split spaghetti error code to a separate section.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/media/omap4iss/iss.c

@@ -887,24 +887,22 @@ void omap4iss_isp_subclk_disable(struct iss_device *iss,
  */
 static int iss_enable_clocks(struct iss_device *iss)
 {
-	int r;
+	int ret;
 
-	r = clk_enable(iss->iss_fck);
-	if (r) {
+	ret = clk_enable(iss->iss_fck);
+	if (ret) {
 		dev_err(iss->dev, "clk_enable iss_fck failed\n");
-		return r;
+		return ret;
 	}
 
-	r = clk_enable(iss->iss_ctrlclk);
-	if (r) {
+	ret = clk_enable(iss->iss_ctrlclk);
+	if (ret) {
 		dev_err(iss->dev, "clk_enable iss_ctrlclk failed\n");
-		goto out_clk_enable_ctrlclk;
+		clk_disable(iss->iss_fck);
+		return ret;
 	}
-	return 0;
 
-out_clk_enable_ctrlclk:
-	clk_disable(iss->iss_fck);
-	return r;
+	return 0;
 }
 
 /*

drivers/staging/media/omap4iss/iss_video.c

@@ -826,16 +826,17 @@ iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
 		spin_unlock_irqrestore(&video->qlock, flags);
 	}
 
-	if (ret < 0) {
+	mutex_unlock(&video->stream_lock);
+	return 0;
+
 err_omap4iss_set_stream:
-		vb2_streamoff(&vfh->queue, type);
+	vb2_streamoff(&vfh->queue, type);
 err_iss_video_check_format:
-		media_entity_pipeline_stop(&video->video.entity);
+	media_entity_pipeline_stop(&video->video.entity);
 err_media_entity_pipeline_start:
-		if (video->iss->pdata->set_constraints)
-			video->iss->pdata->set_constraints(video->iss, false);
-		video->queue = NULL;
-	}
+	if (video->iss->pdata->set_constraints)
+		video->iss->pdata->set_constraints(video->iss, false);
+	video->queue = NULL;
 
 	mutex_unlock(&video->stream_lock);
 	return ret;