From: Dan Carpenter <dan.carpenter@oracle.com>
To: Lee Jones <lee.jones@linaro.org>, Qiao Zhou <zhouqiao@marvell.com>
Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] mfd: 88pm80x: Double shifting bug in suspend/resume
Date: Thu, 04 Aug 2016 05:26:56 +0000 [thread overview]
Message-ID: <20160804052656.GG775@mwanda> (raw)
set_bit() and clear_bit() take the bit number so this code is really
doing "1 << (1 << irq)" which is a double shift bug. It's done
consistently so it won't cause a problem unless "irq" is more than 4.
Fixes: 70c6cce04066 ('mfd: Support 88pm80x in 80x driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/include/linux/mfd/88pm80x.h b/include/linux/mfd/88pm80x.h
index d409ceb..c118a7e 100644
--- a/include/linux/mfd/88pm80x.h
+++ b/include/linux/mfd/88pm80x.h
@@ -350,7 +350,7 @@ static inline int pm80x_dev_suspend(struct device *dev)
int irq = platform_get_irq(pdev, 0);
if (device_may_wakeup(dev))
- set_bit((1 << irq), &chip->wu_flag);
+ set_bit(irq, &chip->wu_flag);
return 0;
}
@@ -362,7 +362,7 @@ static inline int pm80x_dev_resume(struct device *dev)
int irq = platform_get_irq(pdev, 0);
if (device_may_wakeup(dev))
- clear_bit((1 << irq), &chip->wu_flag);
+ clear_bit(irq, &chip->wu_flag);
return 0;
}
WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Lee Jones <lee.jones@linaro.org>, Qiao Zhou <zhouqiao@marvell.com>
Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] mfd: 88pm80x: Double shifting bug in suspend/resume
Date: Thu, 4 Aug 2016 08:26:56 +0300 [thread overview]
Message-ID: <20160804052656.GG775@mwanda> (raw)
set_bit() and clear_bit() take the bit number so this code is really
doing "1 << (1 << irq)" which is a double shift bug. It's done
consistently so it won't cause a problem unless "irq" is more than 4.
Fixes: 70c6cce04066 ('mfd: Support 88pm80x in 80x driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/include/linux/mfd/88pm80x.h b/include/linux/mfd/88pm80x.h
index d409ceb..c118a7e 100644
--- a/include/linux/mfd/88pm80x.h
+++ b/include/linux/mfd/88pm80x.h
@@ -350,7 +350,7 @@ static inline int pm80x_dev_suspend(struct device *dev)
int irq = platform_get_irq(pdev, 0);
if (device_may_wakeup(dev))
- set_bit((1 << irq), &chip->wu_flag);
+ set_bit(irq, &chip->wu_flag);
return 0;
}
@@ -362,7 +362,7 @@ static inline int pm80x_dev_resume(struct device *dev)
int irq = platform_get_irq(pdev, 0);
if (device_may_wakeup(dev))
- clear_bit((1 << irq), &chip->wu_flag);
+ clear_bit(irq, &chip->wu_flag);
return 0;
}
next reply other threads:[~2016-08-04 5:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-04 5:26 Dan Carpenter [this message]
2016-08-04 5:26 ` [patch] mfd: 88pm80x: Double shifting bug in suspend/resume Dan Carpenter
2016-08-09 13:50 ` Lee Jones
2016-08-09 13:50 ` Lee Jones
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