linux-kernel - [PATCH] net: jme: Replace mdelay() with msleep() and usleep_range() in jme_wait

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Message-Id: <20180727082507.3917-1-baijiaju1990@gmail.com>
Date:   Fri, 27 Jul 2018 16:25:07 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     cooldavid@...ldavid.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] net: jme: Replace mdelay() with msleep() and usleep_range() in jme_wait_link()

jme_wait_link() is never called in atomic context.
It calls mdelay() to busily wait, which is not necessary.
mdelay() can be replaced with msleep() and usleep_range().

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
---
 drivers/net/ethernet/jme.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/jme.c b/drivers/net/ethernet/jme.c
index 8a165842fa85..de5ed09212b0 100644
--- a/drivers/net/ethernet/jme.c
+++ b/drivers/net/ethernet/jme.c
@@ -1909,10 +1909,10 @@ jme_wait_link(struct jme_adapter *jme)
 {
 	u32 phylink, to = JME_WAIT_LINK_TIME;
 
-	mdelay(1000);
+	msleep(1000);
 	phylink = jme_linkstat_from_phy(jme);
 	while (!(phylink & PHY_LINK_UP) && (to -= 10) > 0) {
-		mdelay(10);
+		usleep_range(10000, 11000);
 		phylink = jme_linkstat_from_phy(jme);
 	}
 }
-- 
2.17.0