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));