[PATCH v2 1/4] usb: ohci-ep93xx: use devm_ioremap_resource()

[H Hartley Sweeten]

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

Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Acked-by: Alan Stern <st...@rowland.harvard.edu>
Cc: Lennert Buytenhek <ker...@wantstofly.org>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/usb/host/ohci-ep93xx.c | 35 ++++++++++++++---------------------
 1 file changed, 14 insertions(+), 21 deletions(-)

diff --git a/drivers/usb/host/ohci-ep93xx.c b/drivers/usb/host/ohci-ep93xx.c
index 8704e9f..4e12f67 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);
 }
 
-- 
1.8.1.4

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