linux-kernel - [PATCH v2] usb: ehci-s5p: Use devm for requesting ehci_vbus

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Date:	Thu, 14 Mar 2013 20:15:37 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Felipe Balbi <balbi@...com>
Cc:	Alexander Graf <agraf@...e.de>,
	Vivek Gautam <gautam.vivek@...sung.com>,
	Jingoo Han <jg1.han@...sung.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Thomas Abraham <thomas.abraham@...aro.org>,
	Doug Anderson <dianders@...omium.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] usb: ehci-s5p: Use devm for requesting ehci_vbus_gpio

The ehci_vbus_gpio is requested but never freed.  This can cause
problems with deferred probes and would cause problems if
s5p_ehci_remove was ever called.  Use devm to fix this.

Signed-off-by: Doug Anderson <dianders@...omium.org>
---
Changes in v2:
- &pdev->dev => dev elsewhere in s5p_setup_vbus_gpio()

 drivers/usb/host/ehci-s5p.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index 20ebf6a..738490e 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -92,20 +92,21 @@ static void s5p_ehci_phy_disable(struct s5p_ehci_hcd *s5p_ehci)
 
 static void s5p_setup_vbus_gpio(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	int err;
 	int gpio;
 
-	if (!pdev->dev.of_node)
+	if (!dev->of_node)
 		return;
 
-	gpio = of_get_named_gpio(pdev->dev.of_node,
-			"samsung,vbus-gpio", 0);
+	gpio = of_get_named_gpio(dev->of_node, "samsung,vbus-gpio", 0);
 	if (!gpio_is_valid(gpio))
 		return;
 
-	err = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "ehci_vbus_gpio");
+	err = devm_gpio_request_one(dev, gpio, GPIOF_OUT_INIT_HIGH,
+				    "ehci_vbus_gpio");
 	if (err)
-		dev_err(&pdev->dev, "can't request ehci vbus gpio %d", gpio);
+		dev_err(dev, "can't request ehci vbus gpio %d", gpio);
 }
 
 static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);
-- 
1.8.1.3

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