netdev - Re: [Patch net 09/11] net: hns3: bugfix for handling mailbox while the command queue reinitialized

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Message-ID: <e629fcd3-eb19-092a-3683-ec5e5d968a57@huawei.com>
Date:   Sun, 28 Oct 2018 10:20:21 +0800
From:   tanhuazhong <tanhuazhong@...wei.com>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        <davem@...emloft.net>
CC:     <netdev@...r.kernel.org>, <linuxarm@...wei.com>,
        <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
        <lipeng321@...wei.com>
Subject: Re: [Patch net 09/11] net: hns3: bugfix for handling mailbox while
 the command queue reinitialized



On 2018/10/28 3:05, Sergei Shtylyov wrote:
> On 27.10.2018 5:41, Huazhong Tan wrote:
> 
>> 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
> 
>     Command?

yes, thanks.

> 
>> 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.
> 
>     Handler.
> 

yes, thanks.

>>
>> 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");
> 
>     Needs re-initializing.
> 
> [...]
> 
> MBR, Sergei
> 

thanks.

> 
> .
>