linux-kernel - [PATCH 5.14 175/334] drm: bridge: it66121: Check drm_bridge

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Message-Id: <20210913131119.263275770@linuxfoundation.org>
Date:   Mon, 13 Sep 2021 15:13:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Robert Foss <robert.foss@...aro.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 175/334] drm: bridge: it66121: Check drm_bridge_attach retval

From: Robert Foss <robert.foss@...aro.org>

[ Upstream commit bd03d440e2589b9c328f40ce60203adf2b19d2e2 ]

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@...aro.org>
Acked-by: Jernej Skrabec <jernej.skrabec@...il.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210805185039.402178-1-robert.foss@linaro.org
Link: https://patchwork.freedesktop.org/patch/msgid/20210805185039.402178-1-robert.foss@linaro.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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);
-- 
2.30.2