linux-kernel - [PATCH] net: hisilicon: hns: Replace mdelay() with msleep()

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Message-Id: <20180727080141.3079-1-baijiaju1990@gmail.com>
Date:   Fri, 27 Jul 2018 16:01:41 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     yisen.zhuang@...wei.com, salil.mehta@...wei.com,
        davem@...emloft.net, linyunsheng@...wei.com, joe@...ches.com,
        pombredanne@...b.com, bianpan2016@....com, shenjian15@...wei.com,
        keescook@...omium.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] net: hisilicon: hns: Replace mdelay() with msleep()

hns_ppe_common_init_hw() and hns_xgmac_init() are never 
called in atomic context.
They call 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/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c   | 4 ++--
 drivers/net/ethernet/hisilicon/hns/hns_dsaf_xgmac.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
index 93e71e27401b..866e4cec423d 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.c
@@ -203,9 +203,9 @@ static int hns_ppe_common_init_hw(struct ppe_common_cb *ppe_common)
 	enum dsaf_mode dsaf_mode = dsaf_dev->dsaf_mode;
 
 	dsaf_dev->misc_op->ppe_comm_srst(dsaf_dev, 0);
-	mdelay(100);
+	msleep(100);
 	dsaf_dev->misc_op->ppe_comm_srst(dsaf_dev, 1);
-	mdelay(100);
+	msleep(100);
 
 	if (ppe_common->ppe_mode == PPE_COMMON_MODE_SERVICE) {
 		switch (dsaf_mode) {
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_xgmac.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_xgmac.c
index 51e7e9f5af49..fbccd1fd94b0 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_xgmac.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_xgmac.c
@@ -215,10 +215,10 @@ static void hns_xgmac_init(void *mac_drv)
 	u32 port = drv->mac_id;
 
 	dsaf_dev->misc_op->xge_srst(dsaf_dev, port, 0);
-	mdelay(100);
+	msleep(100);
 	dsaf_dev->misc_op->xge_srst(dsaf_dev, port, 1);
 
-	mdelay(100);
+	msleep(100);
 	hns_xgmac_lf_rf_control_init(drv);
 	hns_xgmac_exc_irq_en(drv, 0);
 
-- 
2.17.0