UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/exynos: Add NULL pointer check 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpu/drm/exynos/exynos_drm_iommu.c
View File

@ -47,10 +47,16 @@ int drm_create_iommu_mapping(struct drm_device *drm_dev)
dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms), dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
GFP_KERNEL); GFP_KERNEL);
if (!dev->dma_parms)
goto error;
dma_set_max_seg_size(dev, 0xffffffffu); dma_set_max_seg_size(dev, 0xffffffffu);
dev->archdata.mapping = mapping; dev->archdata.mapping = mapping;
return 0; 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, subdrv_dev->dma_parms = devm_kzalloc(subdrv_dev,
sizeof(*subdrv_dev->dma_parms), sizeof(*subdrv_dev->dma_parms),
GFP_KERNEL); GFP_KERNEL);
if (!subdrv_dev->dma_parms)
return -ENOMEM;
dma_set_max_seg_size(subdrv_dev, 0xffffffffu); dma_set_max_seg_size(subdrv_dev, 0xffffffffu);
ret = arm_iommu_attach_device(subdrv_dev, dev->archdata.mapping); ret = arm_iommu_attach_device(subdrv_dev, dev->archdata.mapping);