From: Florian Fainelli <florian@openwrt.org>
Date: Mon, 8 Oct 2012 13:11:46 +0000 (+0200)
Subject: USB: OHCI: make ohci-platform use devm_request_and_ioremap helper
X-Git-Tag: upstream/snapshot3+hdmi~6133^2~118
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=be7ac70b9b1cb49758d52abb554c92c03acd6f08;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

USB: OHCI: make ohci-platform use devm_request_and_ioremap helper

This patch changes the ohci-platform driver to use the device managed helper
function for requesting memory region and ioremapping memory resources.
As a result the error path in the probe function is simplified, and the
platform driver remove callback does no longer need to release and iounmap
memory resources. devm_request_and_ioremap() will use either the ioremap()
or ioremap_nocache() handler depending on the resource's CACHEABLE flag, so
we are good with this change.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index 1344426..bda4e0b 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -127,29 +127,19 @@ static int __devinit ohci_platform_probe(struct platform_device *dev)
 	hcd->rsrc_start = res_mem->start;
 	hcd->rsrc_len = resource_size(res_mem);
 
-	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
-		dev_err(&dev->dev, "controller already in use");
-		err = -EBUSY;
-		goto err_put_hcd;
-	}
-
-	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
+	hcd->regs = devm_request_and_ioremap(&dev->dev, res_mem);
 	if (!hcd->regs) {
 		err = -ENOMEM;
-		goto err_release_region;
+		goto err_put_hcd;
 	}
 	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 	if (err)
-		goto err_iounmap;
+		goto err_put_hcd;
 
 	platform_set_drvdata(dev, hcd);
 
 	return err;
 
-err_iounmap:
-	iounmap(hcd->regs);
-err_release_region:
-	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 err_put_hcd:
 	usb_put_hcd(hcd);
 err_power:
@@ -165,8 +155,6 @@ static int __devexit ohci_platform_remove(struct platform_device *dev)
 	struct usb_ohci_pdata *pdata = dev->dev.platform_data;
 
 	usb_remove_hcd(hcd);
-	iounmap(hcd->regs);
-	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 	usb_put_hcd(hcd);
 	platform_set_drvdata(dev, NULL);