This is a note to let you know that I've just added the patch titled
net: hns3: add wait until mac link down
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-hns3-add-wait-until-mac-link-down.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6265e242f7b95f2c1195b42ec912b84ad161470e Mon Sep 17 00:00:00 2001
From: Jie Wang <wangjie125@xxxxxxxxxx>
Date: Mon, 7 Aug 2023 19:34:51 +0800
Subject: net: hns3: add wait until mac link down
From: Jie Wang <wangjie125@xxxxxxxxxx>
commit 6265e242f7b95f2c1195b42ec912b84ad161470e upstream.
In some configure flow of hns3 driver, for example, change mtu, it will
disable MAC through firmware before configuration. But firmware disables
MAC asynchronously. The rx traffic may be not stopped in this case.
So fixes it by waiting until mac link is down.
Fixes: a9775bb64aa7 ("net: hns3: fix set and get link ksettings issue")
Signed-off-by: Jie Wang <wangjie125@xxxxxxxxxx>
Signed-off-by: Jijie Shao <shaojijie@xxxxxxxxxx>
Reviewed-by: Leon Romanovsky <leonro@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230807113452.474224-4-shaojijie@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -7658,6 +7658,8 @@ static void hclge_enable_fd(struct hnae3
static void hclge_cfg_mac_mode(struct hclge_dev *hdev, bool enable)
{
+#define HCLGE_LINK_STATUS_WAIT_CNT 3
+
struct hclge_desc desc;
struct hclge_config_mac_mode_cmd *req =
(struct hclge_config_mac_mode_cmd *)desc.data;
@@ -7682,9 +7684,15 @@ static void hclge_cfg_mac_mode(struct hc
req->txrx_pad_fcs_loop_en = cpu_to_le32(loop_en);
ret = hclge_cmd_send(&hdev->hw, &desc, 1);
- if (ret)
+ if (ret) {
dev_err(&hdev->pdev->dev,
"mac enable fail, ret =%d.\n", ret);
+ return;
+ }
+
+ if (!enable)
+ hclge_mac_link_status_wait(hdev, HCLGE_LINK_STATUS_DOWN,
+ HCLGE_LINK_STATUS_WAIT_CNT);
}
static int hclge_config_switch_param(struct hclge_dev *hdev, int vfid,
Patches currently in stable-queue which might be from wangjie125@xxxxxxxxxx are
queue-5.15/net-hns3-refactor-hclge_mac_link_status_wait-for-interface-reuse.patch
queue-5.15/net-hns3-add-wait-until-mac-link-down.patch
