devm_kzalloc can fail. Hence check the pointer to avoid NULL pointer
dereferencing.
Signed-off-by: Sachin Kamat <sachin.ka...@linaro.org>
---
drivers/gpu/drm/exynos/exynos_drm_iommu.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_iommu.c
b/drivers/gpu/drm/exynos/exynos_drm_iommu.c
index 3799d5c..fb8db03 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_iommu.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_iommu.c
@@ -47,10 +47,16 @@ int drm_create_iommu_mapping(struct drm_device *drm_dev)
dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
GFP_KERNEL);
+ if (!dev->dma_parms)
+ goto error;
+
dma_set_max_seg_size(dev, 0xffffffffu);
dev->archdata.mapping = mapping;
return 0;
+error:
+ arm_iommu_release_mapping(mapping);
+ return -ENOMEM;
}
/*
@@ -91,6 +97,9 @@ int drm_iommu_attach_device(struct drm_device *drm_dev,
subdrv_dev->dma_parms = devm_kzalloc(subdrv_dev,
sizeof(*subdrv_dev->dma_parms),
GFP_KERNEL);
+ if (!subdrv_dev->dma_parms)
+ return -ENOMEM;
+
dma_set_max_seg_size(subdrv_dev, 0xffffffffu);
ret = arm_iommu_attach_device(subdrv_dev, dev->archdata.mapping);
--
1.7.9.5
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