linux-kernel - [PATCH -next] rtc: at91sam9: Fix missing spin_lock

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Message-Id: <1469430311-8651-1-git-send-email-weiyj.lk@gmail.com>
Date:	Mon, 25 Jul 2016 07:05:11 +0000
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	Alessandro Zummo <a.zummo@...ertech.it>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:	Wei Yongjun <weiyj.lk@...il.com>, rtc-linux@...glegroups.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH -next] rtc: at91sam9: Fix missing spin_lock_init()

The driver allocates the spinlock but not initialize it.
Use spin_lock_init() on it to initialize it correctly.

This is detected by Coccinelle semantic patch.

Signed-off-by: Wei Yongjun <weiyj.lk@...il.com>
---
 drivers/rtc/rtc-at91sam9.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index 99732e6..7418a76 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -375,6 +375,7 @@ static int at91_rtc_probe(struct platform_device *pdev)
 	if (!rtc)
 		return -ENOMEM;
 
+	spin_lock_init(&rtc->lock);
 	rtc->irq = irq;
 
 	/* platform setup code should have handled this; sigh */