drm/msm: fix return value check in ERR_PTR()

In case of error, the function drm_prime_pages_to_sg() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index df0390f..5999b67 100644 (file)
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -40,9 +40,9 @@ static struct page **get_pages(struct drm_gem_object *obj)
                }
 
                msm_obj->sgt = drm_prime_pages_to_sg(p, npages);
-               if (!msm_obj->sgt) {
+               if (IS_ERR(msm_obj->sgt)) {
                        dev_err(dev->dev, "failed to allocate sgt\n");
-                       return ERR_PTR(-ENOMEM);
+                       return ERR_CAST(msm_obj->sgt);
                }
 
                msm_obj->pages = p;