950-0308-staging-mmal-vchiq-If-the-VPU-returns-an-error-don-t.patch

From 78c34cf60b9ae8bf8aa797c72d2f1abdc0a0bb9d Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Wed, 13 Feb 2019 12:51:03 +0000
Subject: [PATCH] staging: mmal-vchiq: If the VPU returns an error,
 don't negate it

There is an enum for the errors that the VPU can return.
port_parameter_get was negating that value, but also using -EINVAL
from the Linux error codes.
Pass the VPU error code as positive values. Should the function
need to pass a Linux failure, then return that as negative.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
 drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
+++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
@@ -1401,7 +1401,8 @@ static int port_parameter_get(struct vch
 		goto release_msg;
 	}
 
-	ret = -rmsg->u.port_parameter_get_reply.status;
+	ret = rmsg->u.port_parameter_get_reply.status;
+
 	/* port_parameter_get_reply.size includes the header,
 	 * whilst *value_size doesn't.
 	 */