From acfc3d55b7326ff280f1aa64b6d93755619071b3 Mon Sep 17 00:00:00 2001 From: Huazhong Tan Date: Tue, 28 May 2019 17:03:00 +0800 Subject: [PATCH] net: hns3: stop schedule reset service while unloading driver When unloading driver, the reset task should not be scheduled anymore. If disable IRQ before cancel ongoing reset task, the IRQ may be re-enabled by the reset task. This patch uses HCLGE_STATE_REMOVING/HCLGEVF_STATE_REMOVING flag to indicate that the driver is unloading, and we should stop new coming reset service to be scheduled, otherwise, reset service will access some resource which has been freed by unloading. Signed-off-by: Huazhong Tan Signed-off-by: Peng Li Signed-off-by: David S. Miller --- drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 4 +++- drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 4 +++- drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h | 1 + 3 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c index a563815e5ed1..0545f3890d1c 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c @@ -2427,7 +2427,8 @@ static void hclge_mbx_task_schedule(struct hclge_dev *hdev) static void hclge_reset_task_schedule(struct hclge_dev *hdev) { - if (!test_and_set_bit(HCLGE_STATE_RST_SERVICE_SCHED, &hdev->state)) + if (!test_bit(HCLGE_STATE_REMOVING, &hdev->state) && + !test_and_set_bit(HCLGE_STATE_RST_SERVICE_SCHED, &hdev->state)) schedule_work(&hdev->rst_service_task); } @@ -8385,6 +8386,7 @@ static void hclge_state_init(struct hclge_dev *hdev) static void hclge_state_uninit(struct hclge_dev *hdev) { set_bit(HCLGE_STATE_DOWN, &hdev->state); + set_bit(HCLGE_STATE_REMOVING, &hdev->state); if (hdev->service_timer.function) del_timer_sync(&hdev->service_timer); diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c index ee1eecad3b8d..87a619db2780 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c @@ -1621,7 +1621,8 @@ static void hclgevf_get_misc_vector(struct hclgevf_dev *hdev) void hclgevf_reset_task_schedule(struct hclgevf_dev *hdev) { - if (!test_bit(HCLGEVF_STATE_RST_SERVICE_SCHED, &hdev->state)) { + if (!test_bit(HCLGEVF_STATE_RST_SERVICE_SCHED, &hdev->state) && + !test_bit(HCLGEVF_STATE_REMOVING, &hdev->state)) { set_bit(HCLGEVF_STATE_RST_SERVICE_SCHED, &hdev->state); schedule_work(&hdev->rst_service_task); } @@ -2132,6 +2133,7 @@ static void hclgevf_state_init(struct hclgevf_dev *hdev) static void hclgevf_state_uninit(struct hclgevf_dev *hdev) { set_bit(HCLGEVF_STATE_DOWN, &hdev->state); + set_bit(HCLGEVF_STATE_REMOVING, &hdev->state); if (hdev->keep_alive_timer.function) del_timer_sync(&hdev->keep_alive_timer); diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h index eab1095bf221..a7fbd38c1492 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h +++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.h @@ -130,6 +130,7 @@ enum hclgevf_states { HCLGEVF_STATE_DOWN, HCLGEVF_STATE_DISABLED, HCLGEVF_STATE_IRQ_INITED, + HCLGEVF_STATE_REMOVING, HCLGEVF_STATE_NIC_REGISTERED, /* task states */ HCLGEVF_STATE_SERVICE_SCHED, -- 2.30.2