From: Jia-Ju Bai <baijiaju1990@gmail.com>
To: a.zummo@towertech.it, alexandre.belloni@bootlin.com
Cc: linux-rtc@vger.kernel.org, linux-kernel@vger.kernel.org,
Jia-Ju Bai <baijiaju1990@gmail.com>
Subject: [PATCH] rtc: rtc-omap: Replace mdelay() with msleep() in omap_rtc_power_off()
Date: Mon, 30 Jul 2018 21:53:14 +0800 [thread overview]
Message-ID: <20180730135314.9336-1-baijiaju1990@gmail.com> (raw)
omap_rtc_power_off() is never called in atomic context.
It calls mdelay() to busily wait, which is not necessary.
mdelay() can be replaced with msleep().
This is found by a static analysis tool named DCNS written by myself.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
---
drivers/rtc/rtc-omap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 39086398833e..ef3d09525d0f 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -476,7 +476,7 @@ static void omap_rtc_power_off(void)
* power off the system. Add a 500 ms margin for external latencies
* (e.g. debounce circuits).
*/
- mdelay(2500);
+ msleep(2500);
}
static const struct rtc_class_ops omap_rtc_ops = {
--
2.17.0
next reply other threads:[~2018-07-30 15:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-30 13:53 Jia-Ju Bai [this message]
2018-08-27 20:55 ` [PATCH] rtc: rtc-omap: Replace mdelay() with msleep() in omap_rtc_power_off() Alexandre Belloni
2018-08-28 8:49 ` Johan Hovold
2018-08-28 9:06 ` Jia-Ju Bai
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