uhci-platform: use devm_ioremap resource

This patch replaces the memory allocation using request_mem_region and
the ioremap by a single call to managed interface devm_ioremap_reource.
The corresponding calls to release_mem_region and iounmap in the probe
and release functions are now unnecessary and are removed. Also a label
is done away with and linux/device.h is added to make sure the devm_*()
outine declarations are unambiguously available.

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 5 insertions, 17 deletions

diff --git a/drivers/usb/host/uhci-platform.c b/drivers/usb/host/uhci-platform.c
index 01833ab2b5c3..b987f1d10058 100644
--- a/drivers/usb/host/uhci-platform.c
+++ b/drivers/usb/host/uhci-platform.c
@@ -8,6 +8,7 @@
  */
 
 #include <linux/of.h>
+#include <linux/device.h>
 #include <linux/platform_device.h>
 
 static int uhci_platform_init(struct usb_hcd *hcd)
@@ -88,33 +89,22 @@ static int uhci_hcd_platform_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, hcd_name)) {
-                pr_err("%s: request_mem_region failed\n", __func__);
-                ret = -EBUSY;
+        hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(hcd->regs)) {
+                ret = PTR_ERR(hcd->regs);
                 goto err_rmr;
         }
-
-        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
-        if (!hcd->regs) {
-                pr_err("%s: ioremap failed\n", __func__);
-                ret = -ENOMEM;
-                goto err_irq;
-        }
         uhci = hcd_to_uhci(hcd);
 
         uhci->regs = hcd->regs;
 
         ret = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED);
         if (ret)
-                goto err_uhci;
+                goto err_rmr;
 
         device_wakeup_enable(hcd->self.controller);
         return 0;
 
-err_uhci:
-        iounmap(hcd->regs);
-err_irq:
-        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 err_rmr:
         usb_put_hcd(hcd);
 
@@ -126,8 +116,6 @@ static int uhci_hcd_platform_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);
         usb_put_hcd(hcd);
 
         return 0;