AMD IOMMU: __unmap_single: check for bad_dma_address instead of 0
Impact: minor fix
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 3133a0e..a7b6dec 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -983,7 +983,8 @@
dma_addr_t i, start;
unsigned int pages;
- if ((dma_addr == 0) || (dma_addr + size > dma_dom->aperture_size))
+ if ((dma_addr == bad_dma_address) ||
+ (dma_addr + size > dma_dom->aperture_size))
return;
pages = iommu_num_pages(dma_addr, size, PAGE_SIZE);