1 files changed, 4 insertions, 3 deletions

diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c
index dc5d6becd8c7..88815795fe26 100644
--- a/arch/arm/mach-highbank/highbank.c
+++ b/arch/arm/mach-highbank/highbank.c
@@ -115,6 +115,7 @@ static int highbank_platform_notifier(struct notifier_block *nb,
 {
         struct resource *res;
         int reg = -1;
+        u32 val;
         struct device *dev = __dev;
 
         if (event != BUS_NOTIFY_ADD_DEVICE)
@@ -141,10 +142,10 @@ static int highbank_platform_notifier(struct notifier_block *nb,
                 return NOTIFY_DONE;
 
         if (of_property_read_bool(dev->of_node, "dma-coherent")) {
-                writel(0xff31, sregs_base + reg);
+                val = readl(sregs_base + reg);
+                writel(val | 0xff01, sregs_base + reg);
                 set_dma_ops(dev, &arm_coherent_dma_ops);
-        } else
-                writel(0, sregs_base + reg);
+        }
 
         return NOTIFY_OK;
 }