[PATCH] drm/simpledrm: Fix an NULL vs IS_ERR() bug

[Dan Carpenter]

The devm_memremap() function doesn't return NULL, it returns error
pointers.

Fixes: 9a10c7e6519b ("drm/simpledrm: Add support for system memory 
framebuffers")
Signed-off-by: Dan Carpenter <erro...@gmail.com>
---
 drivers/gpu/drm/tiny/simpledrm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c
index 2acc0eb32489..63881a3754f8 100644
--- a/drivers/gpu/drm/tiny/simpledrm.c
+++ b/drivers/gpu/drm/tiny/simpledrm.c
@@ -719,8 +719,8 @@ static struct simpledrm_device 
*simpledrm_device_create(struct drm_driver *drv,
                drm_dbg(dev, "using system memory framebuffer at %pr\n", mem);
 
                screen_base = devm_memremap(dev->dev, mem->start, 
resource_size(mem), MEMREMAP_WC);
-               if (!screen_base)
-                       return ERR_PTR(-ENOMEM);
+               if (IS_ERR(screen_base))
+                       return screen_base;
 
                iosys_map_set_vaddr(&sdev->screen_base, screen_base);
        } else {
-- 
2.35.1