linux-kernel - [PATCH 4/6] rtc: r9701: stop setting RWKCNT

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Message-Id: <20201015191135.471249-4-alexandre.belloni@bootlin.com>
Date:   Thu, 15 Oct 2020 21:11:33 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 4/6] rtc: r9701: stop setting RWKCNT

tm_wday is never checked for validity and it is not read back in
r9701_get_datetime. Avoid setting it to stop tripping static checkers:

        drivers/rtc/rtc-r9701.c:109 r9701_set_datetime()
        error: undefined (user controlled) shift '1 << dt->tm_wday'

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
Cc: Dan Carpenter <dan.carpenter@...cle.com>

 drivers/rtc/rtc-r9701.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/rtc/rtc-r9701.c b/drivers/rtc/rtc-r9701.c
index 4b688e9c4192..183c5a0fe78c 100644
--- a/drivers/rtc/rtc-r9701.c
+++ b/drivers/rtc/rtc-r9701.c
@@ -100,7 +100,6 @@ static int r9701_set_datetime(struct device *dev, struct rtc_time *dt)
 	ret = ret ? ret : write_reg(dev, RDAYCNT, bin2bcd(dt->tm_mday));
 	ret = ret ? ret : write_reg(dev, RMONCNT, bin2bcd(dt->tm_mon + 1));
 	ret = ret ? ret : write_reg(dev, RYRCNT, bin2bcd(dt->tm_year - 100));
-	ret = ret ? ret : write_reg(dev, RWKCNT, 1 << dt->tm_wday);
 
 	return ret;
 }
-- 
2.26.2