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| author | Sachin Kamat <sachin.kamat@linaro.org> | 2013-08-14 16:38:03 +0530 |
|---|---|---|
| committer | Inki Dae <inki.dae@samsung.com> | 2013-09-05 13:43:43 +0900 |
| commit | 4db7fcdf59551d9d0a9fe59bd919a32feae925b2 (patch) | |
| tree | c586e4865da2416963e3d69aea6e55a60d9137e0 | |
| parent | 38bb5253a95f2eb8cb765b7ab88aac686de6cb12 (diff) | |
| download | linux-4db7fcdf59551d9d0a9fe59bd919a32feae925b2.tar.bz2 | |
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>
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_iommu.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_iommu.c b/drivers/gpu/drm/exynos/exynos_drm_iommu.c index 3799d5c2b5df..fb8db0378274 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); |