From bd03d440e2589b9c328f40ce60203adf2b19d2e2 Mon Sep 17 00:00:00 2001
From: Robert Foss <robert.foss@linaro.org>
Date: Thu, 5 Aug 2021 20:50:39 +0200
Subject: [PATCH] drm: bridge: it66121: Check drm_bridge_attach retval
Git-commit: bd03d440e2589b9c328f40ce60203adf2b19d2e2
Patch-mainline: v5.15-rc1
References: git-fixes stable-5.14.4
The return value of drm_bridge_attach() is ignored during
the it66121_bridge_attach() call, which is incorrect.
Fixes: 988156dc2fc9 ("drm: bridge: add it66121 driver")
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210805185039.402178-1-robert.foss@linaro.org
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/bridge/ite-it66121.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c
index 7149ed40af83..2f2a09adb4bc 100644
--- a/drivers/gpu/drm/bridge/ite-it66121.c
+++ b/drivers/gpu/drm/bridge/ite-it66121.c
@@ -536,6 +536,8 @@ static int it66121_bridge_attach(struct drm_bridge *bridge,
return -EINVAL;
ret = drm_bridge_attach(bridge->encoder, ctx->next_bridge, bridge, flags);
+ if (ret)
+ return ret;
ret = regmap_write_bits(ctx->regmap, IT66121_CLK_BANK_REG,
IT66121_CLK_BANK_PWROFF_RCLK, 0);
--
2.26.2