[Intel-gfx] [PATCH] drm/i915: Fix a NULL vs IS_ERR() bug

[Dan Carpenter]

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

Fixes: eaee1c085863 ("drm/i915: Add a function to mmap framebuffer obj")
Signed-off-by: Dan Carpenter <dan.carpenter at linaro.org>
---
 drivers/gpu/drm/i915/gem/i915_gem_mman.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
index 4e7a838ab7bd..aa4d842d4c5a 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
@@ -1085,8 +1085,8 @@ int i915_gem_fb_mmap(struct drm_i915_gem_object *obj, struct vm_area_struct *vma
 		/* handle stolen and smem objects */
 		mmap_type = i915_ggtt_has_aperture(ggtt) ? I915_MMAP_TYPE_GTT : I915_MMAP_TYPE_WC;
 		mmo = mmap_offset_attach(obj, mmap_type, NULL);
-		if (!mmo)
-			return -ENODEV;
+		if (IS_ERR(mmo))
+			return PTR_ERR(mmo);
 	}
 
 	/*
-- 
2.39.2