The drm_gem_cma_create() function never returns NULL but rather an error
encoded in the return value using the ERR_PTR() macro. Callers therefore
need to check for errors using the IS_ERR() macro. This change allows
drivers to handle contiguous DMA allocation failures gracefully.
Signed-off-by: Thierry Reding <thierry.reding at avionic-design.de>
---
drivers/gpu/drm/drm_fb_cma_helper.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c
b/drivers/gpu/drm/drm_fb_cma_helper.c
index d6c80a3..fd9d0af 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -220,7 +220,7 @@ static int drm_fbdev_cma_create(struct drm_fb_helper
*helper,
size = mode_cmd.pitches[0] * mode_cmd.height;
obj = drm_gem_cma_create(dev, size);
- if (!obj)
+ if (IS_ERR(obj))
return -ENOMEM;
fbi = framebuffer_alloc(0, dev->dev);
--
1.7.12.4
