drivers/usb/host/ehci-cns3xxx.c: use devm_ functions

The various devm_ functions allocate memory that is released when a driver
detaches.  This patch uses these functions for data that is allocated in
the probe function of a platform device and is only freed in the remove
function.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 14 deletions

diff --git a/drivers/usb/host/ehci-cns3xxx.c b/drivers/usb/host/ehci-cns3xxx.c
index caaa3e5be334..d91708d2e729 100644
--- a/drivers/usb/host/ehci-cns3xxx.c
+++ b/drivers/usb/host/ehci-cns3xxx.c
@@ -105,27 +105,17 @@ static int cns3xxx_ehci_probe(struct platform_device *pdev)
         hcd->rsrc_start = res->start;
         hcd->rsrc_len = resource_size(res);
 
-        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
-                                driver->description)) {
-                dev_dbg(dev, "controller already in use\n");
-                retval = -EBUSY;
-                goto err1;
-        }
-
-        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+        hcd->regs = devm_request_and_ioremap(&pdev->dev, res);
         if (hcd->regs == NULL) {
                 dev_dbg(dev, "error mapping memory\n");
                 retval = -EFAULT;
-                goto err2;
+                goto err1;
         }
 
         retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
         if (retval == 0)
                 return retval;
 
-        iounmap(hcd->regs);
-err2:
-        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 err1:
         usb_put_hcd(hcd);
 
@@ -137,8 +127,6 @@ static int cns3xxx_ehci_remove(struct platform_device *pdev)
         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 
         usb_remove_hcd(hcd);
-        iounmap(hcd->regs);
-        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 
         /*
          * EHCI and OHCI share the same clock and power,