net: hns3: fix get wrong pfc_en when query PFC configuration

Currently, when query PFC configuration by dcbtool, driver will return
PFC enable status based on TC. As all priorities are mapped to TC0 by
default, if TC0 is enabled, then all priorities mapped to TC0 will be
shown as enabled status when query PFC setting, even though some
priorities have never been set.

for example:
$ dcb pfc show dev eth0
pfc-cap 4 macsec-bypass off delay 0
prio-pfc 0:off 1:off 2:off 3:off 4:off 5:off 6:off 7:off
$ dcb pfc set dev eth0 prio-pfc 0:on 1:on 2:on 3:on
$ dcb pfc show dev eth0
pfc-cap 4 macsec-bypass off delay 0
prio-pfc 0:on 1:on 2:on 3:on 4:on 5:on 6:on 7:on

To fix this problem, just returns user's PFC config parameter saved in
driver.

Fixes: cacde272dd00 ("net: hns3: Add hclge_dcb module for the support of DCB feature")
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
index 5bf5db91d16cc9aa1152d5ab6a88056b88e4d3af..39f56f245d843b703989c0fe0d9dc4e3ebac5654 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c
@@ -255,21 +255,12 @@ static int hclge_ieee_getpfc(struct hnae3_handle *h, struct ieee_pfc *pfc)
        u64 requests[HNAE3_MAX_TC], indications[HNAE3_MAX_TC];
        struct hclge_vport *vport = hclge_get_vport(h);
        struct hclge_dev *hdev = vport->back;
-       u8 i, j, pfc_map, *prio_tc;
        int ret;
+       u8 i;
 
        memset(pfc, 0, sizeof(*pfc));
        pfc->pfc_cap = hdev->pfc_max;
-       prio_tc = hdev->tm_info.prio_tc;
-       pfc_map = hdev->tm_info.hw_pfc_map;
-
-       /* Pfc setting is based on TC */
-       for (i = 0; i < hdev->tm_info.num_tc; i++) {
-               for (j = 0; j < HNAE3_MAX_USER_PRIO; j++) {
-                       if ((prio_tc[j] == i) && (pfc_map & BIT(i)))
-                               pfc->pfc_en |= BIT(j);
-               }
-       }
+       pfc->pfc_en = hdev->tm_info.pfc_en;
 
        ret = hclge_pfc_tx_stats_get(hdev, requests);
        if (ret)