[patch] drm/imx: drm_dev_alloc() returns error pointers

[Dan Carpenter]

We are checking for NULL here, when we should be checking for error
pointers.

Fixes: 54db5decce17 ("drm/imx: drop deprecated load/unload drm_driver ops")
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/gpu/drm/imx/imx-drm-core.c 
b/drivers/gpu/drm/imx/imx-drm-core.c
index 98df09c..3acc976 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) {