From: Peng Li <lipeng321@huawei.com>
Date: Thu, 20 Dec 2018 11:52:00 +0800
Subject: net: hns3: fix a bug caused by udelay
Patch-mainline: v5.0-rc1
Git-commit: 1b7d7b0581173219b82abbd81c88cf8aa7d402c2
References: bsc#1104353 FATE#326415

udelay() in driver may always occupancy processor. If there is only
one cpu in system, the VF driver may initialize fail when insmod
PF and VF driver in the same system. This patch use msleep() to free
cpu when VF wait PF message.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c
@@ -26,7 +26,7 @@ static int hclgevf_get_mbx_resp(struct h
 				u8 *resp_data, u16 resp_len)
 {
 #define HCLGEVF_MAX_TRY_TIMES	500
-#define HCLGEVF_SLEEP_USCOEND	1000
+#define HCLGEVF_SLEEP_USECOND	1000
 	struct hclgevf_mbx_resp_status *mbx_resp;
 	u16 r_code0, r_code1;
 	int i = 0;
@@ -43,7 +43,7 @@ static int hclgevf_get_mbx_resp(struct h
 		if (test_bit(HCLGEVF_STATE_CMD_DISABLE, &hdev->state))
 			return -EIO;
 
-		udelay(HCLGEVF_SLEEP_USCOEND);
+		usleep_range(HCLGEVF_SLEEP_USECOND, HCLGEVF_SLEEP_USECOND * 2);
 		i++;
 	}