linux-kernel - [PATCH v2] uhci-platform: use devm

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 12 Jun 2014 00:48:44 +0530
From:	Himangi Saraogi <himangi774@...il.com>
To:	Tony Prisk <linux@...sktech.co.nz>,
	Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-arm-kernel@...ts.infradead.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	julia.lawall@...6.fr
Subject: [PATCH v2] 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@...il.com>
Acked-by: Julia Lawall <julia.lawall@...6.fr>
---
v2: pass correct arguments to devm_ioremap_resource
Not compile tested due to incompatible architecture.

 drivers/usb/host/uhci-platform.c | 22 +++++-----------------
 1 file changed, 5 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/host/uhci-platform.c b/drivers/usb/host/uhci-platform.c
index 01833ab..b987f1d 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;
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/