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Date: Sat, 27 Oct 2018 16:10:16 +0800 From: Huazhong Tan <tanhuazhong@...wei.com> To: <davem@...emloft.net> CC: <netdev@...r.kernel.org>, <linuxarm@...wei.com>, <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>, <lipeng321@...wei.com>, <linyunsheng@...wei.com> Subject: [Patch V2 net 09/11] net: hns3: bugfix for handling mailbox while the command queue reinitialized In a multi-core machine, the mailbox service and reset service will be executed at the same time. The reset server will re-initialize the commond queue, before that, the mailbox handler can only get some invalid messages. The HCLGE_STATE_CMD_DISABLE flag means that the command queue is not available and needs to be reinitialized. Therefore, when the mailbox hanlder recognizes this flag, it should not process the command. Fixes: dde1a86e93ca ("net: hns3: Add mailbox support to PF driver") Signed-off-by: Huazhong Tan <tanhuazhong@...wei.com> --- drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c index 04462a3..6ac2fab 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_mbx.c @@ -400,6 +400,12 @@ void hclge_mbx_handler(struct hclge_dev *hdev) /* handle all the mailbox requests in the queue */ while (!hclge_cmd_crq_empty(&hdev->hw)) { + if (test_bit(HCLGE_STATE_CMD_DISABLE, &hdev->state)) { + dev_warn(&hdev->pdev->dev, + "command queue need re-initialize\n"); + return; + } + desc = &crq->desc[crq->next_to_use]; req = (struct hclge_mbx_vf_to_pf_cmd *)desc->data; -- 2.7.4
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