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-rw-r--r--arch/powerpc/sysdev/fsl_pci.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 44bc903ead74..9817f63723dd 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -41,6 +41,9 @@ static int __init setup_one_atmu(struct ccsr_pci __iomem *pci,
pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n",
(u64)res->start, (u64)size);
+ if (res->flags & IORESOURCE_PREFETCH)
+ flags |= 0x10000000; /* enable relaxed ordering */
+
for (i = 0; size > 0; i++) {
unsigned int bits = min(__ilog2(size),
__ffs(pci_addr | phys_addr));
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