| Message ID | 20180727084104.29726-1-baijiaju1990@gmail.com |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
| Series | net: usb: sr9700: Replace mdelay() with msleep() in sr9700_bind() | expand |
Dear Jia-Ju Bai :
OK.
the patch is ok.
liujunliang_ljl@163.com
From: Jia-Ju Bai
Date: 2018-07-27 16:41
To: liujunliang_ljl
CC: linux-usb; netdev; linux-kernel; Jia-Ju Bai
Subject: [PATCH] net: usb: sr9700: Replace mdelay() with msleep() in sr9700_bind()
sr9700_bind() 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/net/usb/sr9700.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/usb/sr9700.c b/drivers/net/usb/sr9700.c
index 2d316c1b851b..6ac232e52bf7 100644
--- a/drivers/net/usb/sr9700.c
+++ b/drivers/net/usb/sr9700.c
@@ -358,7 +358,7 @@ static int sr9700_bind(struct usbnet *dev, struct usb_interface *intf)
/* power up and reset phy */
sr_write_reg(dev, SR_PRR, PRR_PHY_RST);
/* at least 10ms, here 20ms for safe */
- mdelay(20);
+ msleep(20);
sr_write_reg(dev, SR_PRR, 0);
/* at least 1ms, here 2ms for reading right register */
udelay(2 * 1000);
From: Jia-Ju Bai <baijiaju1990@gmail.com> Date: Fri, 27 Jul 2018 16:41:04 +0800 > sr9700_bind() 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> Applied.
diff --git a/drivers/net/usb/sr9700.c b/drivers/net/usb/sr9700.c index 2d316c1b851b..6ac232e52bf7 100644 --- a/drivers/net/usb/sr9700.c +++ b/drivers/net/usb/sr9700.c @@ -358,7 +358,7 @@ static int sr9700_bind(struct usbnet *dev, struct usb_interface *intf) /* power up and reset phy */ sr_write_reg(dev, SR_PRR, PRR_PHY_RST); /* at least 10ms, here 20ms for safe */ - mdelay(20); + msleep(20); sr_write_reg(dev, SR_PRR, 0); /* at least 1ms, here 2ms for reading right register */ udelay(2 * 1000);
sr9700_bind() 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/net/usb/sr9700.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)