net/hns3: fix DCB reconfiguration

Whether the enable bit of the pfc ("pfc_en") is changed or not is one of
the conditions for reconfiguring the DCB. Currently, pfc_en is not
rolled back when DCB configuration fails. This patch fixes it.

Fixes: 62e3ccc2b94c ("net/hns3: support flow control")
Cc: stable@dpdk.org
Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>

diff --git a/drivers/net/hns3/hns3_dcb.c b/drivers/net/hns3/hns3_dcb.c
index 1cb6adb..90c0d04 100644 (file)
--- a/drivers/net/hns3/hns3_dcb.c
+++ b/drivers/net/hns3/hns3_dcb.c
@@ -1543,6 +1543,7 @@ hns3_dcb_hw_configure(struct hns3_adapter *hns)
        enum hns3_fc_status fc_status = hw->current_fc_status;
        enum hns3_fc_mode requested_fc_mode = hw->requested_fc_mode;
        uint8_t hw_pfc_map = hw->dcb_info.hw_pfc_map;
+       uint8_t pfc_en = hw->dcb_info.pfc_en;
        int ret;
 
        if (pf->tx_sch_mode != HNS3_FLAG_TC_BASE_SCH_MODE &&
@@ -1596,6 +1597,7 @@ pfc_setup_fail:
        hw->current_fc_status = fc_status;
 
 buffer_alloc_fail:
+       hw->dcb_info.pfc_en = pfc_en;
        hw->dcb_info.hw_pfc_map = hw_pfc_map;
 
        return ret;