linux-kernel - [PATCH v2] gpu: anx7808: fix a missing check in anx78xx

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Date:   Mon, 24 Dec 2018 23:02:34 -0600
From:   Kangjie Lu <kjlu@....edu>
To:     kjlu@....edu
Cc:     pakki001@....edu, Archit Taneja <architt@...eaurora.org>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] gpu: anx7808: fix a missing check in anx78xx_poweron

Both anx78xx_set_bits() and anx78xx_clear_bits() in the poweron process
may fail. The fix inserts checks for their return values.

Signed-off-by: Kangjie Lu <kjlu@....edu>
---
 drivers/gpu/drm/bridge/analogix-anx78xx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/analogix-anx78xx.c b/drivers/gpu/drm/bridge/analogix-anx78xx.c
index 3b0fe2b188db..4f35aced65a0 100644
--- a/drivers/gpu/drm/bridge/analogix-anx78xx.c
+++ b/drivers/gpu/drm/bridge/analogix-anx78xx.c
@@ -646,6 +646,7 @@ static void anx78xx_poweron(struct anx78xx *anx78xx)
 				err);
 		return;
 	}
+
 	err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
 			SP_POWERDOWN_CTRL_REG,
 			SP_REGISTER_PD | SP_TOTAL_PD);
-- 
2.17.2 (Apple Git-113)