linux-kernel - [PATCH 09/50] staging: mmal-vchiq: If the VPU returns an error, don't negate it

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Message-Id: <20200623164235.29566-10-nsaenzjulienne@suse.de>
Date:   Tue, 23 Jun 2020 18:41:55 +0200
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     gregkh@...uxfoundation.org
Cc:     kernel-list@...pberrypi.com, laurent.pinchart@...asonboard.com,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devel@...verdev.osuosl.org,
        Dave Stevenson <dave.stevenson@...pberrypi.org>,
        Jacopo Mondi <jacopo@...ndi.org>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Subject: [PATCH 09/50] staging: mmal-vchiq: If the VPU returns an error, don't negate it

From: Dave Stevenson <dave.stevenson@...pberrypi.org>

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@...pberrypi.org>
Signed-off-by: Jacopo Mondi <jacopo@...ndi.org>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
---
 drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
index df2957abc37c..a7ab0e521184 100644
--- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
+++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
@@ -1270,7 +1270,8 @@ static int port_parameter_get(struct vchiq_mmal_instance *instance,
 		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.
 	 */
-- 
2.27.0