linux-kernel - [PATCH] drm/imx: Fix error handling

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Message-Id: <20161031175917.4053-1-christophe.jaillet@wanadoo.fr>
Date:   Mon, 31 Oct 2016 18:59:17 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     p.zabel@...gutronix.de, airlied@...ux.ie
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] drm/imx: Fix error handling

'drm_dev_alloc()' returns an error pointer in case of error, not NULL
So test it with IS_ERR.

This behavior has been introduced recently in	0f2886057be3. For some
reason, this file has not been updated.

Fixes: 0f2886057be3 ("drm: Don't swallow error codes in drm_dev_alloc()")

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/gpu/drm/imx/imx-drm-core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c
index 98df09c2b388..3acc976cc04e 100644
--- a/drivers/gpu/drm/imx/imx-drm-core.c
+++ b/drivers/gpu/drm/imx/imx-drm-core.c
@@ -357,8 +357,8 @@ static int imx_drm_bind(struct device *dev)
 	int ret;
 
 	drm = drm_dev_alloc(&imx_drm_driver, dev);
-	if (!drm)
-		return -ENOMEM;
+	if (IS_ERR(drm))
+		return PTR_ERR(drm);
 
 	imxdrm = devm_kzalloc(dev, sizeof(*imxdrm), GFP_KERNEL);
 	if (!imxdrm) {
-- 
2.9.3