Messages in this thread Patch in this message | | | From | Zhouyi Zhou <> | Subject | [PATCH v2] IOMMU: iopte free should check wether input argument is NULL | Date | Wed, 5 Mar 2014 18:20:19 +0800 |
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From: Zhouyi Zhou <zhouzhouyi@gmail.com>
iopte free should check wether input argument is 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>
--- 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 bcd78a7..51211e8 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -523,7 +523,8 @@ 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)
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