Messages in this thread Patch in this message |  | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.7 10/31] mfd: 88pm80x: Double shifting bug in suspend/resume | Date | Fri, 14 Oct 2016 14:54:54 +0200 |
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4.7-stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter <dan.carpenter@oracle.com>
commit 9a6dc644512fd083400a96ac4a035ac154fe6b8d upstream.
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> Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- include/linux/mfd/88pm80x.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/include/linux/mfd/88pm80x.h +++ b/include/linux/mfd/88pm80x.h @@ -350,7 +350,7 @@ static inline int pm80x_dev_suspend(stru 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(struc 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; }
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