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().
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210818171318.1848272-2-robert.foss@linaro.org

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);