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From 0f27af14383edac1efaf140d7cbe2d7dfdab7318 Mon Sep 17 00:00:00 2001
From: Peng Li <lipeng321@huawei.com>
Date: Thu, 20 Dec 2018 11:52:00 +0800
Subject: [PATCH 24/31] net: hns3: fix a bug caused by udelay
Origin: https://git.kernel.org/linus/1b7d7b0581173219b82abbd81c88cf8aa7d402c2
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>
---
drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
Index: linux/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c
===================================================================
--- linux.orig/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_mbx.c
+++ linux/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;
@@ -40,7 +40,7 @@ static int hclgevf_get_mbx_resp(struct h
}
while ((!hdev->mbx_resp.received_resp) && (i < HCLGEVF_MAX_TRY_TIMES)) {
- udelay(HCLGEVF_SLEEP_USCOEND);
+ usleep_range(HCLGEVF_SLEEP_USECOND, HCLGEVF_SLEEP_USECOND * 2);
i++;
}
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