linux-kernel - [PATCH 1/1] rtc: ds1685: correct check of day of month

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Message-Id: <1463598569-4329-1-git-send-email-xypron.glpk@gmx.de>
Date:	Wed, 18 May 2016 21:09:29 +0200
From:	Heinrich Schuchardt <xypron.glpk@....de>
To:	Joshua Kinard <kumba@...too.org>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org,
	Heinrich Schuchardt <xypron.glpk@....de>
Subject: [PATCH 1/1] rtc: ds1685: correct check of day of month

Operator ! has a higher priority than &&.
(!(mday >= 1) && (mday <= 31)) is false for mday == 32.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>
---
 drivers/rtc/rtc-ds1685.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-ds1685.c b/drivers/rtc/rtc-ds1685.c
index b3ce3c6..b4fae3c 100644
--- a/drivers/rtc/rtc-ds1685.c
+++ b/drivers/rtc/rtc-ds1685.c
@@ -389,7 +389,7 @@ ds1685_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 	ds1685_rtc_end_data_access(rtc);
 
 	/* Check month date. */
-	if (!(mday >= 1) && (mday <= 31))
+	if ((mday < 1) || (mday > 31))
 		return -EDOM;
 
 	/*
@@ -461,7 +461,7 @@ ds1685_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 				     RTC_MDAY_BCD_MASK);
 
 	/* Check the month date for validity. */
-	if (!(mday >= 1) && (mday <= 31))
+	if ((mday < 1) || (mday > 31))
 		return -EDOM;
 
 	/*
-- 
2.1.4