usb: host: ohci-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>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 32f2ff1e93ce..060a6a414750 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -196,10 +196,9 @@ 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;
         }