linux-kernel - Re: [PATCH 2/8] scsi: libsas: check the lldd callback correctly

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Date:   Fri, 1 Jun 2018 08:15:42 +0800
From:   Jason Yan <yanaijie@...wei.com>
To:     John Garry <john.garry@...wei.com>, <martin.petersen@...cle.com>,
        <jejb@...ux.vnet.ibm.com>
CC:     <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <zhaohongjiang@...wei.com>, <hare@...e.com>,
        <dan.j.williams@...el.com>, <jthumshirn@...e.de>, <hch@....de>,
        <huangdaode@...ilicon.com>, <chenxiang66@...ilicon.com>,
        <xiexiuqi@...wei.com>, <tj@...nel.org>, <miaoxie@...wei.com>,
        Ewan Milne <emilne@...hat.com>, Tomas Henzl <thenzl@...hat.com>
Subject: Re: [PATCH 2/8] scsi: libsas: check the lldd callback correctly



On 2018/5/31 22:09, John Garry wrote:
> On 29/05/2018 03:23, Jason Yan wrote:
>> We are using lldd_port_deformed so we'd better check if
>> lldd_port_deformed
>> is NULL.
>>
>> Signed-off-by: Jason Yan <yanaijie@...wei.com>
>> CC: John Garry <john.garry@...wei.com>
>> CC: Johannes Thumshirn <jthumshirn@...e.de>
>> CC: Ewan Milne <emilne@...hat.com>
>> CC: Christoph Hellwig <hch@....de>
>> CC: Tomas Henzl <thenzl@...hat.com>
>> CC: Dan Williams <dan.j.williams@...el.com>
>> CC: Hannes Reinecke <hare@...e.com>
>> ---
>>  drivers/scsi/libsas/sas_discover.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/scsi/libsas/sas_discover.c
>> b/drivers/scsi/libsas/sas_discover.c
>> index a0fa7ef3a071..354f6db5bb66 100644
>> --- a/drivers/scsi/libsas/sas_discover.c
>> +++ b/drivers/scsi/libsas/sas_discover.c
>> @@ -260,7 +260,7 @@ static void sas_suspend_devices(struct work_struct
>> *work)
>>       * phy_list is not being mutated
>>       */
>>      list_for_each_entry(phy, &port->phy_list, port_phy_el) {
>> -        if (si->dft->lldd_port_formed)
>> +        if (si->dft->lldd_port_deformed)
>
> If you do make this change, then you can remove
> hisi_sas_port_deformed(), as it is just a stub to avoid a jump to NULL
> from above.
>

OK, I will remove it.

>>              si->dft->lldd_port_deformed(phy);
>>          phy->suspended = 1;
>>          port->suspended = 1;
>>
>
>
>
> .
>