patches.renesas/0962-usb-host-xhci-plat-use-devm_functions.patch

From d80fa6bee8ef019c02e7389e1ca88604938990b1 Mon Sep 17 00:00:00 2001
From: Himangi Saraogi <himangi774@gmail.com>
Date: Fri, 20 Jun 2014 23:11:23 +0530
Subject: usb: host: xhci-plat: use devm_functions

This patch introduces the use of managed interface devm_ioremap_resource
for ioremap_nocache and request_mem_region and removes the corresponding
free functions in the probe and remove functions.

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Cc: Mathias Nyman <mathias.nyman@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit fd666348c51f6ab66410c98a149e0418b9a258f0)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
 drivers/usb/host/xhci-plat.c | 24 ++++--------------------
 1 file changed, 4 insertions(+), 20 deletions(-)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index e41e4b476ee3..5cb5de1ee766 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -146,20 +146,12 @@ static int xhci_plat_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(&pdev->dev, "controller already in use\n");
-		ret = -EBUSY;
+	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(hcd->regs)) {
+		ret = PTR_ERR(hcd->regs);
 		goto put_hcd;
 	}
 
-	hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
-	if (!hcd->regs) {
-		dev_dbg(&pdev->dev, "error mapping memory\n");
-		ret = -EFAULT;
-		goto release_mem_region;
-	}
-
 	/*
 	 * Not all platforms have a clk so it is not an error if the
 	 * clock does not exists.
@@ -168,7 +160,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if (!IS_ERR(clk)) {
 		ret = clk_prepare_enable(clk);
 		if (ret)
-			goto unmap_registers;
+			goto put_hcd;
 	}
 
 	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
@@ -213,12 +205,6 @@ disable_clk:
 	if (!IS_ERR(clk))
 		clk_disable_unprepare(clk);
 
-unmap_registers:
-	iounmap(hcd->regs);
-
-release_mem_region:
-	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
-
 put_hcd:
 	usb_put_hcd(hcd);
 
@@ -237,8 +223,6 @@ static int xhci_plat_remove(struct platform_device *dev)
 	usb_remove_hcd(hcd);
 	if (!IS_ERR(clk))
 		clk_disable_unprepare(clk);
-	iounmap(hcd->regs);
-	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 	usb_put_hcd(hcd);
 	kfree(xhci);
 
-- 
2.1.2