linux-kernel - Re: [PATCH] scsi: libsas: Grab the host lock in sas_ata_device_link

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Date:   Wed, 21 Dec 2022 09:47:23 +0800
From:   yangxingui <yangxingui@...wei.com>
To:     John Garry <john.g.garry@...cle.com>, <jejb@...ux.ibm.com>,
        <martin.petersen@...cle.com>, <niklas.cassel@....com>,
        <damien.lemoal@...nsource.wdc.com>
CC:     <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, <prime.zeng@...ilicon.com>,
        <kangfenglong@...wei.com>
Subject: Re: [PATCH] scsi: libsas: Grab the host lock in
 sas_ata_device_link_abort()



On 2022/12/20 22:59, John Garry wrote:
> On 20/12/2022 12:53, Xingui Yang wrote:
>> Grab the host lock in sas_ata_device_link_abort() before calling
> 
> This is should be the ata port lock, right? I know that the ata comments 
> say differently.
ok, I will update the commit message and use ata port lock instead.
> 
>> ata_link_abort(), as the comment in ata_link_abort() mentions.
>>
> 
> Can you please add a fixes tag?
ok, I will update and add a fix tag.

Thanks,
Xingui
> 
>> Signed-off-by: Xingui Yang <yangxingui@...wei.com>
> 
> Reviewed-by: John Garry <john.g.garry@...cle.com>
> 
>> ---
>>   drivers/scsi/libsas/sas_ata.c | 3 +++
>>   1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/scsi/libsas/sas_ata.c 
>> b/drivers/scsi/libsas/sas_ata.c
>> index f7439bf9cdc6..4f2017b21e6d 100644
>> --- a/drivers/scsi/libsas/sas_ata.c
>> +++ b/drivers/scsi/libsas/sas_ata.c
>> @@ -889,7 +889,9 @@ void sas_ata_device_link_abort(struct 
>> domain_device *device, bool force_reset)
>>   {
>>       struct ata_port *ap = device->sata_dev.ap;
>>       struct ata_link *link = &ap->link;
>> +    unsigned long flags;
>> +    spin_lock_irqsave(ap->lock, flags);
>>       device->sata_dev.fis[2] = ATA_ERR | ATA_DRDY; /* tf status */
>>       device->sata_dev.fis[3] = ATA_ABORTED; /* tf error */
>> @@ -897,6 +899,7 @@ void sas_ata_device_link_abort(struct 
>> domain_device *device, bool force_reset)
>>       if (force_reset)
>>           link->eh_info.action |= ATA_EH_RESET;
>>       ata_link_abort(link);
>> +    spin_unlock_irqrestore(ap->lock, flags);
>>   }
>>   EXPORT_SYMBOL_GPL(sas_ata_device_link_abort);
> 
> .