linux-kernel - [PATCH 5/7] vc04_services: vchiq_arm: Drop VCHIQ

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Date:   Thu, 15 Dec 2022 12:28:51 +0530
From:   Umang Jain <umang.jain@...asonboard.com>
To:     linux-staging@...ts.linux.dev,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Kees Cook <keescook@...omium.org>,
        Stefan Wahren <stefan.wahren@...e.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Adrien Thierry <athierry@...hat.com>,
        Dan Carpenter <error27@...il.com>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Kieran Bingham <kieran.bingham@...asonboard.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Umang Jain <umang.jain@...asonboard.com>
Subject: [PATCH 5/7] vc04_services: vchiq_arm: Drop VCHIQ_RETRY usage on disconnect

Drop the usage of VCHIQ_RETRY when the vchiq has connection status
VCHIQ_CONNSTATE_DISCONNECTED. Disconnected is will not be valid to
carry on a retry, replace the VCHIQ_RETRY with -EINVAL.

This patch removes the usage of vCHIQ_RETRY completely and act as
intermediatory to address the TODO item:
	* Get rid of custom function return values
for vc04_services/interface.

Signed-off-by: Umang Jain <umang.jain@...asonboard.com>
---
 .../staging/vc04_services/interface/vchiq_arm/vchiq_core.c    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
index 07a3d3a55092..3b36b0644ae3 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
@@ -3641,7 +3641,7 @@ vchiq_loud_error_footer(void)
 int vchiq_send_remote_use(struct vchiq_state *state)
 {
 	if (state->conn_state == VCHIQ_CONNSTATE_DISCONNECTED)
-		return VCHIQ_RETRY;
+		return -EINVAL;
 
 	return queue_message(state, NULL, MAKE_REMOTE_USE, NULL, NULL, 0, 0);
 }
@@ -3649,7 +3649,7 @@ int vchiq_send_remote_use(struct vchiq_state *state)
 int vchiq_send_remote_use_active(struct vchiq_state *state)
 {
 	if (state->conn_state == VCHIQ_CONNSTATE_DISCONNECTED)
-		return VCHIQ_RETRY;
+		return -EINVAL;
 
 	return queue_message(state, NULL, MAKE_REMOTE_USE_ACTIVE,
 			     NULL, NULL, 0, 0);
-- 
2.38.1