openwrt/target/linux/brcm2708/patches-3.10/0133-V4L2-Fix-issue-of-driver-jamming-if-STREAMON-failed.patch

From a29f4da13057535935fb2b390b01b46b4a4d133b Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dsteve@broadcom.com>
Date: Mon, 9 Dec 2013 11:05:24 +0000
Subject: [PATCH 133/174] V4L2: Fix issue of driver jamming if STREAMON failed.

Fix issue where the driver was left in a partially enabled
state if STREAMON failed, and would then reject many IOCTLs
as it thought it was streaming.

Signed-off-by: Dave Stevenson <dsteve@broadcom.com>
---
 drivers/media/platform/bcm2835/bcm2835-camera.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

--- a/drivers/media/platform/bcm2835/bcm2835-camera.c
+++ b/drivers/media/platform/bcm2835/bcm2835-camera.c
@@ -425,7 +425,15 @@ static int start_streaming(struct vb2_qu
 	    vchiq_mmal_port_enable(dev->instance, dev->capture.port, buffer_cb);
 	if (ret) {
 		v4l2_err(&dev->v4l2_dev,
-			 "Failed to enable capture port - error %d\n", ret);
+			"Failed to enable capture port - error %d. "
+			"Disabling camera port again\n", ret);
+
+		vchiq_mmal_port_disable(dev->instance,
+					dev->capture.camera_port);
+		if (disable_camera(dev) < 0) {
+			v4l2_err(&dev->v4l2_dev, "Failed to disable camera");
+			return -EINVAL;
+		}
 		return -1;
 	}