USB: ohci-s3c2410: use devm_ functions

The devm_ functions allocate memory that is released when a driver
detaches. This makes the code smaller and a bit simpler.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 8 insertions, 24 deletions

diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c
index 281d5c658e36..e84190f25c6b 100644
--- a/drivers/usb/host/ohci-s3c2410.c
+++ b/drivers/usb/host/ohci-s3c2410.c
@@ -323,8 +323,6 @@ usb_hcd_s3c2410_remove(struct usb_hcd *hcd, struct platform_device *dev)
 {
         usb_remove_hcd(hcd);
         s3c2410_stop_hc(dev);
-        iounmap(hcd->regs);
-        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
         usb_put_hcd(hcd);
 }
 
@@ -353,35 +351,29 @@ static int usb_hcd_s3c2410_probe(const struct hc_driver *driver,
         hcd->rsrc_start = dev->resource[0].start;
         hcd->rsrc_len   = resource_size(&dev->resource[0]);
 
-        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
-                dev_err(&dev->dev, "request_mem_region failed\n");
-                retval = -EBUSY;
+        hcd->regs = devm_request_and_ioremap(&dev->dev, &dev->resource[0]);
+        if (!hcd->regs) {
+                dev_err(&dev->dev, "devm_request_and_ioremap failed\n");
+                retval = -ENOMEM;
                 goto err_put;
         }
 
-        clk = clk_get(&dev->dev, "usb-host");
+        clk = devm_clk_get(&dev->dev, "usb-host");
         if (IS_ERR(clk)) {
                 dev_err(&dev->dev, "cannot get usb-host clock\n");
                 retval = PTR_ERR(clk);
-                goto err_mem;
+                goto err_put;
         }
 
-        usb_clk = clk_get(&dev->dev, "usb-bus-host");
+        usb_clk = devm_clk_get(&dev->dev, "usb-bus-host");
         if (IS_ERR(usb_clk)) {
                 dev_err(&dev->dev, "cannot get usb-bus-host clock\n");
                 retval = PTR_ERR(usb_clk);
-                goto err_clk;
+                goto err_put;
         }
 
         s3c2410_start_hc(dev, hcd);
 
-        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
-        if (!hcd->regs) {
-                dev_err(&dev->dev, "ioremap failed\n");
-                retval = -ENOMEM;
-                goto err_ioremap;
-        }
-
         ohci_hcd_init(hcd_to_ohci(hcd));
 
         retval = usb_add_hcd(hcd, dev->resource[1].start, 0);
@@ -392,14 +384,6 @@ static int usb_hcd_s3c2410_probe(const struct hc_driver *driver,
 
  err_ioremap:
         s3c2410_stop_hc(dev);
-        iounmap(hcd->regs);
-        clk_put(usb_clk);
-
- err_clk:
-        clk_put(clk);
-
- err_mem:
-        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 
  err_put:
         usb_put_hcd(hcd);