From: Huazhong Tan Date: Tue, 30 Oct 2018 13:50:52 +0000 (+0800) Subject: net: hns3: bugfix for rtnl_lock's range in the hclge_reset() X-Git-Tag: rel_imx_4.19.35_1.1.0~8455 X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=92cb1b096a08723daaf78d5c202c53b11bb282b9;p=linux.git net: hns3: bugfix for rtnl_lock's range in the hclge_reset() [ Upstream commit a963052e539887df481d4d3a6ad4c92ca6461852 ] Since hclge_reset_wait() is used to wait for the hardware to complete the reset, it is not necessary to hold the rtnl_lock during hclge_reset_wait(). So this patch releases the lock for the duration of hclge_reset_wait(). Fixes: 6d4fab39533f ("net: hns3: Reset net device with rtnl_lock") Signed-off-by: Huazhong Tan Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c index db763450e5e3..340baf6a470c 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c @@ -2804,14 +2804,17 @@ static void hclge_reset(struct hclge_dev *hdev) handle = &hdev->vport[0].nic; rtnl_lock(); hclge_notify_client(hdev, HNAE3_DOWN_CLIENT); + rtnl_unlock(); if (!hclge_reset_wait(hdev)) { + rtnl_lock(); hclge_notify_client(hdev, HNAE3_UNINIT_CLIENT); hclge_reset_ae_dev(hdev->ae_dev); hclge_notify_client(hdev, HNAE3_INIT_CLIENT); hclge_clear_reset_cause(hdev); } else { + rtnl_lock(); /* schedule again to check pending resets later */ set_bit(hdev->reset_type, &hdev->reset_pending); hclge_reset_task_schedule(hdev);