linux-kernel - [PATCH v2 2/2] drm/bridge: anx7625: Propagate errors from sp_tx_edid

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Message-Id: <20210818171318.1848272-2-robert.foss@linaro.org>
Date:   Wed, 18 Aug 2021 19:13:18 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     a.hajda@...sung.com, narmstrong@...libre.com,
        robert.foss@...aro.org, Laurent.pinchart@...asonboard.com,
        jonas@...boo.se, jernej.skrabec@...il.com, airlied@...ux.ie,
        daniel@...ll.ch, xji@...logixsemi.com, pihsun@...omium.org,
        tzungbi@...gle.com, sam@...nborg.org, hsinyi@...omium.org,
        drinkcat@...omium.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] drm/bridge: anx7625: Propagate errors from sp_tx_edid_read()

During the sp_tx_edid_read() call the return value of sp_tx_edid_read()
is ignored, which could cause potential errors to go unhandled.

All errors which are returned by sp_tx_edid_read() are handled in
anx7625_get_edid().

Signed-off-by: Robert Foss <robert.foss@...aro.org>
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index ea414cd349b5c..abc8db77bfd36 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -845,8 +845,11 @@ static int sp_tx_edid_read(struct anx7625_data *ctx,
 				if (g_edid_break == 1)
 					break;
 
-				segments_edid_read(ctx, count / 2,
-						   pblock_buf, offset);
+				ret = segments_edid_read(ctx, count / 2,
+							 pblock_buf, offset);
+				if (ret < 0)
+					return ret;
+
 				memcpy(&pedid_blocks_buf[edid_pos],
 				       pblock_buf,
 				       MAX_DPCD_BUFFER_SIZE);
@@ -863,8 +866,11 @@ static int sp_tx_edid_read(struct anx7625_data *ctx,
 				if (g_edid_break == 1)
 					break;
 
-				segments_edid_read(ctx, count / 2,
-						   pblock_buf, offset);
+				ret = segments_edid_read(ctx, count / 2,
+							 pblock_buf, offset);
+				if (ret < 0)
+					return ret;
+
 				memcpy(&pedid_blocks_buf[edid_pos],
 				       pblock_buf,
 				       MAX_DPCD_BUFFER_SIZE);
-- 
2.30.2