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| author | Zhouyi Zhou <zhouzhouyi@gmail.com> | 2014-03-05 18:20:19 +0800 |
|---|---|---|
| committer | Joerg Roedel <joro@8bytes.org> | 2014-03-05 23:02:40 +0100 |
| commit | e28045ab2e2a8e27d08275bf70be33868beba8fd (patch) | |
| tree | f17793b32ff1e67170595b440d9d84dd73e3cfb0 /drivers/iommu | |
| parent | 07a0203021149140f83e64a9ac5fe7ed09a74afc (diff) | |
| download | lwn-e28045ab2e2a8e27d08275bf70be33868beba8fd.tar.gz lwn-e28045ab2e2a8e27d08275bf70be33868beba8fd.zip | |
iommu/omap: Check for NULL in iopte_free()
The iopte_free() function should check for NULL because
kmem_cache_free() will panic on NULL argument.
Signed-off-by: Zhouyi Zhou <yizhouzhou@ict.ac.cn>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/omap-iommu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index 8acea87cbc0e..7fcbfc498fa9 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -520,7 +520,8 @@ static void flush_iopte_range(u32 *first, u32 *last) static void iopte_free(u32 *iopte) { /* Note: freed iopte's must be clean ready for re-use */ - kmem_cache_free(iopte_cachep, iopte); + if (iopte) + kmem_cache_free(iopte_cachep, iopte); } static u32 *iopte_alloc(struct omap_iommu *obj, u32 *iopgd, u32 da) |