usb: host: xhci-plat: use ioremap_nocache
authorRuchika Kharwar <ruchika@ti.com>
Fri, 10 Aug 2012 06:58:30 +0000 (09:58 +0300)
committerSarah Sharp <sarah.a.sharp@linux.intel.com>
Wed, 5 Sep 2012 19:07:19 +0000 (12:07 -0700)
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
drivers/usb/host/xhci-plat.c

index 689bc18..df90fe5 100644 (file)
@@ -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;