linux-kernel - [PATCH] input: touchscreen: wdt87xx_i2c: Replace mdelay() with msleep() in wdt87xx

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Message-Id: <20180727023216.1467-1-baijiaju1990@gmail.com>
Date:   Fri, 27 Jul 2018 10:32:16 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     dmitry.torokhov@...il.com, rydberg@...math.org,
        gregkh@...uxfoundation.org, andi@...zian.org
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] input: touchscreen: wdt87xx_i2c: Replace mdelay() with msleep() in wdt87xx_resume()

wdt87xx_resume() 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@...il.com>
---
 drivers/input/touchscreen/wdt87xx_i2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/wdt87xx_i2c.c b/drivers/input/touchscreen/wdt87xx_i2c.c
index 20f7f3902757..166edeb77776 100644
--- a/drivers/input/touchscreen/wdt87xx_i2c.c
+++ b/drivers/input/touchscreen/wdt87xx_i2c.c
@@ -1142,7 +1142,7 @@ static int __maybe_unused wdt87xx_resume(struct device *dev)
 	 * The chip may have been reset while system is resuming,
 	 * give it some time to settle.
 	 */
-	mdelay(100);
+	msleep(100);
 
 	error = wdt87xx_send_command(client, VND_CMD_START, 0);
 	if (error)
-- 
2.17.0