net: hns3: reallocate SSU' buffer size when pfc_en changes

BugLink: https://bugs.launchpad.net/bugs/1856334
[ Upstream commit aea8cfb35a82d6c2f3517c86694933ba766635e5 ]

When a TC's PFC is disabled or enabled, the RX private buffer for
this TC need to be changed too, otherwise this may cause packet
dropped problem.

This patch fixes it by calling hclge_buffer_alloc to reallocate
buffer when pfc_en changes.

Fixes: cacde272dd00 ("net: hns3: Add hclge_dcb module for the support of DCB feature")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Connor Kuehl <connor.kuehl@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
index bac4ce13f6ae44dd54a2d28efbcd374fcc2dfecb..d9136a199d8db95b34fc0d808e30cd298ad7a1e4 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
@@ -302,6 +302,7 @@ static int hclge_ieee_setpfc(struct hnae3_handle *h, struct ieee_pfc *pfc)
        struct hclge_vport *vport = hclge_get_vport(h);
        struct hclge_dev *hdev = vport->back;
        u8 i, j, pfc_map, *prio_tc;
+       int ret;
 
        if (!(hdev->dcbx_cap & DCB_CAP_DCBX_VER_IEEE) ||
            hdev->flag & HCLGE_FLAG_MQPRIO_ENABLE)
@@ -327,7 +328,21 @@ static int hclge_ieee_setpfc(struct hnae3_handle *h, struct ieee_pfc *pfc)
 
        hclge_tm_pfc_info_update(hdev);
 
-       return hclge_pause_setup_hw(hdev, false);
+       ret = hclge_pause_setup_hw(hdev, false);
+       if (ret)
+               return ret;
+
+       ret = hclge_notify_client(hdev, HNAE3_DOWN_CLIENT);
+       if (ret)
+               return ret;
+
+       ret = hclge_buffer_alloc(hdev);
+       if (ret) {
+               hclge_notify_client(hdev, HNAE3_UP_CLIENT);
+               return ret;
+       }
+
+       return hclge_notify_client(hdev, HNAE3_UP_CLIENT);
 }
 
 /* DCBX configuration */