usb: ohci-ep93xx: use devm_ioremap_resource()

Use devm_ioremap_resource() to make the code a bit cleaner and
simpler.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 14 insertions, 21 deletions

diff --git a/drivers/usb/host/ohci-ep93xx.c b/drivers/usb/host/ohci-ep93xx.c
index 8704e9fa5a80..4e12f67a32dd 100644
--- a/drivers/usb/host/ohci-ep93xx.c
+++ b/drivers/usb/host/ohci-ep93xx.c
@@ -43,38 +43,37 @@ static void ep93xx_stop_hc(struct device *dev)
 static int usb_hcd_ep93xx_probe(const struct hc_driver *driver,
                          struct platform_device *pdev)
 {
-        int retval;
         struct usb_hcd *hcd;
+        struct resource *res;
+        int retval;
 
         if (pdev->resource[1].flags != IORESOURCE_IRQ) {
                 dev_dbg(&pdev->dev, "resource[1] is not IORESOURCE_IRQ\n");
                 return -ENOMEM;
         }
 
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res)
+                return -ENXIO;
+
         hcd = usb_create_hcd(driver, &pdev->dev, "ep93xx");
         if (hcd == NULL)
                 return -ENOMEM;
 
-        hcd->rsrc_start = pdev->resource[0].start;
-        hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
-        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
-                usb_put_hcd(hcd);
-                retval = -EBUSY;
-                goto err1;
-        }
+        hcd->rsrc_start = res->start;
+        hcd->rsrc_len = resource_size(res);
 
-        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
-        if (hcd->regs == NULL) {
-                dev_dbg(&pdev->dev, "ioremap failed\n");
-                retval = -ENOMEM;
-                goto err2;
+        hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(hcd->regs)) {
+                retval = PTR_ERR(hcd->regs);
+                goto err_put_hcd;
         }
 
         usb_host_clock = clk_get(&pdev->dev, NULL);
         if (IS_ERR(usb_host_clock)) {
                 dev_dbg(&pdev->dev, "clk_get failed\n");
                 retval = PTR_ERR(usb_host_clock);
-                goto err3;
+                goto err_put_hcd;
         }
 
         ep93xx_start_hc(&pdev->dev);
@@ -86,11 +85,7 @@ static int usb_hcd_ep93xx_probe(const struct hc_driver *driver,
                 return retval;
 
         ep93xx_stop_hc(&pdev->dev);
-err3:
-        iounmap(hcd->regs);
-err2:
-        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
-err1:
+err_put_hcd:
         usb_put_hcd(hcd);
 
         return retval;
@@ -102,8 +97,6 @@ static void usb_hcd_ep93xx_remove(struct usb_hcd *hcd,
         usb_remove_hcd(hcd);
         ep93xx_stop_hc(&pdev->dev);
         clk_put(usb_host_clock);
-        iounmap(hcd->regs);
-        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
         usb_put_hcd(hcd);
 }