From: Wei Yongjun <yongjun_...@trendmicro.com.cn>
In case of error, function arm_iommu_create_mapping() 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 at trendmicro.com.cn>
---
drivers/gpu/drm/exynos/exynos_drm_iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_iommu.c
b/drivers/gpu/drm/exynos/exynos_drm_iommu.c
index 09db198..3b3d3a6 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_iommu.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_iommu.c
@@ -56,7 +56,7 @@ int drm_create_iommu_mapping(struct drm_device *drm_dev)
mapping = arm_iommu_create_mapping(&platform_bus_type, priv->da_start,
priv->da_space_size,
priv->da_space_order);
- if (!mapping)
+ if (IS_ERR(mapping))
return -ENOMEM;
dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
