From: Guangbin Huang huangguangbin2@huawei.com
mainline inclusion from mainline-v5.14 commit 8c1671e0d13d4a0ba4fb3a0da932bf3736d7ff73 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I46N6O CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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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 Reviewed-by: Yongxin Li liyongxin1@huawei.com Signed-off-by: Junxin Chen chenjunxin1@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- .../net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c index 5bf5db91d16c..39f56f245d84 100644 --- 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)