usb: host: uhci-grlib.c : use devm_ functions

The various devm_ functions allocate memory that is released when a
driver detaches. This patch uses devm_ioremap_resource for data
that is allocated in the probe function of a platform device and
is only freed in the remove function. The corresponding free functions
are removed and two labels are done away with. Also, linux/device.h
is added to make sure the devm_*() routine declarations are
unambiguously available.

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Andreas Larsson <andreas@gaisler.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/uhci-grlib.c b/drivers/usb/host/uhci-grlib.c
index ab25dc3..05f57ff 100644 (file)
--- a/drivers/usb/host/uhci-grlib.c
+++ b/drivers/usb/host/uhci-grlib.c
@@ -17,6 +17,7 @@
  * (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
  */
 
+#include <linux/device.h>
 #include <linux/of_irq.h>
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
@@ -113,24 +114,17 @@ static int uhci_hcd_grlib_probe(struct platform_device *op)
        hcd->rsrc_start = res.start;
        hcd->rsrc_len = resource_size(&res);
 
-       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
-               printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
-               rv = -EBUSY;
-               goto err_rmr;
-       }
-
        irq = irq_of_parse_and_map(dn, 0);
        if (irq == NO_IRQ) {
                printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
                rv = -EBUSY;
-               goto err_irq;
+               goto err_usb;
        }
 
-       hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
-       if (!hcd->regs) {
-               printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
-               rv = -ENOMEM;
-               goto err_ioremap;
+       hcd->regs = devm_ioremap_resource(&op->dev, &res);
+       if (IS_ERR(hcd->regs)) {
+               rv = PTR_ERR(hcd->regs);
+               goto err_irq;
        }
 
        uhci = hcd_to_uhci(hcd);
@@ -139,18 +133,14 @@ static int uhci_hcd_grlib_probe(struct platform_device *op)
 
        rv = usb_add_hcd(hcd, irq, 0);
        if (rv)
-               goto err_uhci;
+               goto err_irq;
 
        device_wakeup_enable(hcd->self.controller);
        return 0;
 
-err_uhci:
-       iounmap(hcd->regs);
-err_ioremap:
-       irq_dispose_mapping(irq);
 err_irq:
-       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
-err_rmr:
+       irq_dispose_mapping(irq);
+err_usb:
        usb_put_hcd(hcd);
 
        return rv;
@@ -164,10 +154,7 @@ static int uhci_hcd_grlib_remove(struct platform_device *op)
 
        usb_remove_hcd(hcd);
 
-       iounmap(hcd->regs);
        irq_dispose_mapping(hcd->irq);
-       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
-
        usb_put_hcd(hcd);
 
        return 0;