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 c7081c75de8a273e6df05ba6716467ac35b0be50..d1c76216350f60fd65c7106a1146ab563daaead6 100644 (file)
--- 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;
        }