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drm/exynos: Add NULL pointer check

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devm_kzalloc can fail. Hence check the pointer to avoid NULL pointer
dereferencing.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Sachin Kamat 2013-08-14 16:38:03 +05:30 committed by Inki Dae
parent 38bb5253a9
commit 4db7fcdf59
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/exynos/exynos_drm_iommu.c
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@ -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);