From: Zhouyi Zhou <zhouzho...@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 <yizhouz...@ict.ac.cn>
Signed-off-by: Joerg Roedel <j...@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)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
