[42/74] x86/amd-iommu: Fix possible integer overflow

[Greg KH]

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Joerg Roedel <joerg.roedel@xxxxxxx>

commit d91afd15b041f27d34859c79afa9e172018a86f4 upstream.

The variable i in this function could be increased to over
2**32 which would result in an integer overflow when using
int. Fix it by changing i to unsigned long.

Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 arch/x86/kernel/amd_iommu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -540,7 +540,7 @@ static void flush_all_devices_for_iommu(
 static void flush_devices_by_domain(struct protection_domain *domain)
 {
 	struct amd_iommu *iommu;
-	int i;
+	unsigned long i;
 
 	for (i = 0; i <= amd_iommu_last_bdf; ++i) {
 		if ((domain == NULL && amd_iommu_pd_table[i] == NULL) ||


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