From: Huazhong Tan Date: Tue, 30 Oct 2018 13:50:46 +0000 (+0800) Subject: net: hns3: bugfix for the initialization of command queue's spin lock X-Git-Tag: v4.20-rc1~37^2~5^2~7 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=b2f74dbaf12bf59ff35d451005b3cdee78232ff0;p=uclinux-h8%2Flinux.git net: hns3: bugfix for the initialization of command queue's spin lock The spin lock of the command queue only need to be initialized once when the driver initializes the command queue. It is not necessary to initialize the spin lock when resetting. At the same time, the modification of the queue member should be performed after acquiring the lock. Fixes: 3efb960f056d ("net: hns3: Refactor the initialization of command queue") Signed-off-by: Huazhong Tan Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c index ac13cb2b168e..68026a5ad7e7 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_cmd.c @@ -304,6 +304,10 @@ int hclge_cmd_queue_init(struct hclge_dev *hdev) { int ret; + /* Setup the lock for command queue */ + spin_lock_init(&hdev->hw.cmq.csq.lock); + spin_lock_init(&hdev->hw.cmq.crq.lock); + /* Setup the queue entries for use cmd queue */ hdev->hw.cmq.csq.desc_num = HCLGE_NIC_CMQ_DESC_NUM; hdev->hw.cmq.crq.desc_num = HCLGE_NIC_CMQ_DESC_NUM; @@ -337,18 +341,20 @@ int hclge_cmd_init(struct hclge_dev *hdev) u32 version; int ret; + spin_lock_bh(&hdev->hw.cmq.csq.lock); + spin_lock_bh(&hdev->hw.cmq.crq.lock); + hdev->hw.cmq.csq.next_to_clean = 0; hdev->hw.cmq.csq.next_to_use = 0; hdev->hw.cmq.crq.next_to_clean = 0; hdev->hw.cmq.crq.next_to_use = 0; - /* Setup the lock for command queue */ - spin_lock_init(&hdev->hw.cmq.csq.lock); - spin_lock_init(&hdev->hw.cmq.crq.lock); - hclge_cmd_init_regs(&hdev->hw); clear_bit(HCLGE_STATE_CMD_DISABLE, &hdev->state); + spin_unlock_bh(&hdev->hw.cmq.crq.lock); + spin_unlock_bh(&hdev->hw.cmq.csq.lock); + ret = hclge_cmd_query_firmware_version(&hdev->hw, &version); if (ret) { dev_err(&hdev->pdev->dev,