From a9a74beb23488ffb9370d5b533f2f2152e08f3b9 Mon Sep 17 00:00:00 2001 From: Jian Shen Date: Thu, 18 Nov 2021 20:44:32 +0800 Subject: [PATCH 138/283] net: hns3: don't rollback when destroy mqprio fail mainline inclusion from mainline-v5.15-rc4 commit d82650be60ee92e7486f755f5387023278aa933f category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I8EMYT CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d82650be60ee92e7486f755f5387023278aa933f ---------------------------------------------------------------------- For destroy mqprio is irreversible in stack, so it's unnecessary to rollback the tc configuration when destroy mqprio failed. Otherwise, it may cause the configuration being inconsistent between driver and netstack. As the failure is usually caused by reset, and the driver will restore the configuration after reset, so it can keep the configuration being consistent between driver and hardware. Fixes: 5a5c90917467 ("net: hns3: add support for tc mqprio offload") Signed-off-by: Jian Shen Signed-off-by: Guangbin Huang Signed-off-by: David S. Miller Reviewed-by: Yongxin Li Signed-off-by: Junxin Chen Signed-off-by: Zheng Zengkai Signed-off-by: Xiaodong Li Conflicts: drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c --- .../hisilicon/hns3/hns3pf/hclge_dcb.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c index 188daf75be32..d748c6404436 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_dcb.c @@ -525,13 +525,18 @@ static int hclge_setup_tc(struct hnae3_handle *h, return hclge_notify_init_up(hdev); err_out: - /* roll-back */ - memcpy(&kinfo->tc_info, &old_tc_info, sizeof(old_tc_info)); - if (hclge_config_tc(hdev, &kinfo->tc_info)) - dev_err(&hdev->pdev->dev, - "failed to roll back tc configuration\n"); - - (void)hclge_notify_init_up(hdev); + if (!tc) { + dev_warn(&hdev->pdev->dev, + "failed to destroy mqprio, will active after reset, ret = %d\n", + ret); + } else { + /* roll-back */ + memcpy(&kinfo->tc_info, &old_tc_info, sizeof(old_tc_info)); + if (hclge_config_tc(hdev, &kinfo->tc_info)) + dev_err(&hdev->pdev->dev, + "failed to roll back tc configuration\n"); + } + hclge_notify_init_up(hdev); return ret; } -- 2.34.1