From: Vivek Gautam <gautam.vivek@samsung.com>
Date: Sat, 10 May 2014 12:00:05 +0000 (+0530)
Subject: usb: host: ehci-exynos: Use devm_ioremap_resource instead of devm_ioremap
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4e24bde33fd26af51b2f0c69ec5a5d847f6f26a5;p=openwrt%2Fstaging%2Fblogic.git

usb: host: ehci-exynos: Use devm_ioremap_resource instead of devm_ioremap

Using devm_ioremap_resource() API should actually be preferred over
devm_ioremap(), since the former request the mem region first and then
gives back the ioremap'ed memory pointer.
devm_ioremap_resource() calls request_mem_region(), therby preventing
other drivers to make any overlapping call to the same region.

Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index c7081c75de8a..d1c76216350f 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -218,10 +218,9 @@ skip_phy:
 
 	hcd->rsrc_start = res->start;
 	hcd->rsrc_len = resource_size(res);
-	hcd->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
-	if (!hcd->regs) {
-		dev_err(&pdev->dev, "Failed to remap I/O memory\n");
-		err = -ENOMEM;
+	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(hcd->regs)) {
+		err = PTR_ERR(hcd->regs);
 		goto fail_io;
 	}