linux-kernel - [PATCH 2/2] ide: pdc202xx_new: Replace mdelay with msleep in init_chipset

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Message-Id: <1523433176-3954-1-git-send-email-baijiaju1990@gmail.com>
Date:   Wed, 11 Apr 2018 15:52:56 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     davem@...emloft.net, frankt@...mise.com, andre@...ux-ide.org
Cc:     linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH 2/2] ide: pdc202xx_new: Replace mdelay with msleep in init_chipset_pdcnew

init_chipset_pdcnew() is never called in atomic context.
This function is only set as ".init_chipset" in struct ide_port_info.

Despite never getting called from atomic context, init_chipset_pdcnew()
calls mdelay() to busily wait.
This is not necessary and can be replaced with msleep() to
avoid busy waiting.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.

Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
---
 drivers/ide/pdc202xx_new.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ide/pdc202xx_new.c b/drivers/ide/pdc202xx_new.c
index b33646b..a654491 100644
--- a/drivers/ide/pdc202xx_new.c
+++ b/drivers/ide/pdc202xx_new.c
@@ -403,7 +403,7 @@ static int init_chipset_pdcnew(struct pci_dev *dev)
 	outb(pll_ctl1, sec_dma_base + 0x03);

 	/* Wait the PLL circuit to be stable */
-	mdelay(30);
+	msleep(30);

 #ifdef DEBUG
 	/*
-- 
1.9.1