From: Ruchika Kharwar <ruchika@ti.com>
Date: Fri, 10 Aug 2012 06:58:30 +0000 (+0300)
Subject: usb: host: xhci-plat: use ioremap_nocache
X-Git-Tag: v3.5.5~98
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5ebe93346ca0356975854c33d50cc8c0266c7537;p=thirdparty%2Fkernel%2Fstable.git

usb: host: xhci-plat: use ioremap_nocache

commit 319acdfc064169023cd9ada5085b434fbcdacec2 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 689bc18b051d6..df90fe51b4aa2 100644
--- 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;