linux-kernel - [PATCH 2/2] pinctrl: core: Add proper mutex lock in pinctrl_request

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Date:	Mon, 19 Aug 2013 10:07:46 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Patrice Chotard <patrice.chotard@...com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] pinctrl: core: Add proper mutex lock in
 pinctrl_request_gpio

This one is missed in commit 42fed7ba "pinctrl: move subsystem mutex to
pinctrl_dev struct".

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 drivers/pinctrl/core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 53c40d9..92f86ab 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -562,11 +562,15 @@ int pinctrl_request_gpio(unsigned gpio)
 		return ret;
 	}
 
+	mutex_lock(&pctldev->mutex);
+
 	/* Convert to the pin controllers number space */
 	pin = gpio_to_pin(range, gpio);
 
 	ret = pinmux_request_gpio(pctldev, range, pin, gpio);
 
+	mutex_unlock(&pctldev->mutex);
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(pinctrl_request_gpio);
-- 
1.8.1.2



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