From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754588AbdBETnN (ORCPT + 2 others); Sun, 5 Feb 2017 14:43:13 -0500 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:28347 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754116AbdBET1J (ORCPT ); Sun, 5 Feb 2017 14:27:09 -0500 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux@roeck-us.net Cc: Dan Carpenter , Lee Jones , Willy Tarreau Subject: [PATCH 3.10 314/319] mfd: 88pm80x: Double shifting bug in suspend/resume Date: Sun, 5 Feb 2017 20:22:16 +0100 Message-Id: <1486322541-8206-215-git-send-email-w@1wt.eu> X-Mailer: git-send-email 2.8.0.rc2.1.gbe9624a In-Reply-To: <1486322541-8206-1-git-send-email-w@1wt.eu> References: <1486322541-8206-1-git-send-email-w@1wt.eu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: From: Dan Carpenter 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 Signed-off-by: Lee Jones Signed-off-by: Willy Tarreau --- include/linux/mfd/88pm80x.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/mfd/88pm80x.h b/include/linux/mfd/88pm80x.h index e94537b..b55c95d 100644 --- a/include/linux/mfd/88pm80x.h +++ b/include/linux/mfd/88pm80x.h @@ -345,7 +345,7 @@ 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; } @@ -357,7 +357,7 @@ 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; } -- 2.8.0.rc2.1.gbe9624a