From: Marek Vasut <marex@denx.de>
Date: Mon, 1 Aug 2022 12:54:19 +0000 (+0200)
Subject: drm/bridge: lvds-codec: Fix error checking of drm_of_lvds_get_data_mapping()
X-Git-Tag: baikal/aarch64/sdk6.1~2968^2~17^2~62
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=7d96f257792c8cbe72aa13f44944036c4460dbd6;p=kernel.git

drm/bridge: lvds-codec: Fix error checking of drm_of_lvds_get_data_mapping()

The drm_of_lvds_get_data_mapping() returns either negative value on
error or MEDIA_BUS_FMT_* otherwise. The check for 'ret' would also
catch the positive case of MEDIA_BUS_FMT_* and lead to probe failure
every time 'data-mapping' DT property is specified.

Fixes: 90054c85dbfec ("drm: of: Add drm_of_lvds_get_data_mapping")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
To: dri-devel@lists.freedesktop.org
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220801125419.167562-1-marex@denx.de
---

diff --git a/drivers/gpu/drm/bridge/lvds-codec.c b/drivers/gpu/drm/bridge/lvds-codec.c
index 702ea803a743c..39e7004de7200 100644
--- a/drivers/gpu/drm/bridge/lvds-codec.c
+++ b/drivers/gpu/drm/bridge/lvds-codec.c
@@ -180,7 +180,7 @@ static int lvds_codec_probe(struct platform_device *pdev)
 		of_node_put(bus_node);
 		if (ret == -ENODEV) {
 			dev_warn(dev, "missing 'data-mapping' DT property\n");
-		} else if (ret) {
+		} else if (ret < 0) {
 			dev_err(dev, "invalid 'data-mapping' DT property\n");
 			return ret;
 		} else {