usb: host: xhci-plat: use ioremap_nocache

Use the ioremap_nocache variant of the ioremap API in
order to make sure our memory will be marked uncachable.

This patch should be backported to kernels as old as 3.4, that contain
the commit 3429e91a661e1f383aecc86c6bbcf65afb15c892 "usb: host: xhci:
add platform driver support".

Signed-off-by: Ruchika Kharwar <ruchika@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 689bc18b051d6c1d1ae8e381e887a01edbdfc9e9..df90fe51b4aa2d406b8b2f8bfa591c410df89a35 100644 (file)
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -118,7 +118,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
                goto put_hcd;
        }
 
-       hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+       hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
        if (!hcd->regs) {
                dev_dbg(&pdev->dev, "error mapping memory\n");
                ret = -EFAULT;