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From: "chenxiang (M)" <chenxiang66@hisilicon.com>
To: John Garry <john.garry@huawei.com>, <tj@kernel.org>,
	<martin.petersen@oracle.com>, <brking@us.ibm.com>
Cc: <linux-ide@vger.kernel.org>, <linux-scsi@vger.kernel.org>,
	"axboe@kernel.dk" <axboe@kernel.dk>
Subject: Re: [PATCH v2] ata: libata: Remove unused parameter in function ata_sas_port_alloc()
Date: Fri, 22 May 2020 11:23:01 +0800
Message-ID: <4dfda592-d5cc-59cf-7f27-5fcc71e59671@hisilicon.com> (raw)
In-Reply-To: <2174ba8a-065e-4bc6-b0a0-f8394a9e7563@huawei.com>



在 2020/5/21 15:23, John Garry 写道:
> On 21/05/2020 02:17, chenxiang wrote:
>> From: Xiang Chen <chenxiang66@hisilicon.com>
>>
>> Input Parameter shost in function ata_sas_port_alloc() is not used, so
>> remove it.
>>
>> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
>> ---
>>   drivers/ata/libata-sata.c     | 4 +---
>>   drivers/scsi/ipr.c            | 2 +-
>>   drivers/scsi/libsas/sas_ata.c | 2 +-
>>   include/linux/libata.h        | 2 +-
>>   4 files changed, 4 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c
>> index c16423e..a3c83fe 100644
>> --- a/drivers/ata/libata-sata.c
>> +++ b/drivers/ata/libata-sata.c
>> @@ -1070,7 +1070,6 @@ EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
>>    *    port_alloc - Allocate port for a SAS attached SATA device
>>    *    @host: ATA host container for all SAS ports
>>    *    @port_info: Information from low-level host driver
>> - *    @shost: SCSI host that the scsi device is attached to
>>    *
>>    *    LOCKING:
>>    *    PCI/etc. bus probe sem.
>> @@ -1080,8 +1079,7 @@ EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
>>    */
>>     struct ata_port *ata_sas_port_alloc(struct ata_host *host,
>> -                    struct ata_port_info *port_info,
>> -                    struct Scsi_Host *shost)
>> +                    struct ata_port_info *port_info)
>>   {
>>       struct ata_port *ap;
>
> A better change could be to add the following, instead of removing the 
> argument:
>
>     ap->scsi_host = shost;
>
> And remove the setting from the callsites, upon successful return. But 
> then we would need to pass shost=NULL for ipr, as it does not seem to 
> set ap->shost - but that may be an oversight.

OK, i will update it in next version.

>
> Thanks,
> John
>
>>   diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
>> index 7d77997..331c41c 100644
>> --- a/drivers/scsi/ipr.c
>> +++ b/drivers/scsi/ipr.c
>> @@ -4816,7 +4816,7 @@ static int ipr_target_alloc(struct scsi_target 
>> *starget)
>>           if (!sata_port)
>>               return -ENOMEM;
>>   -        ap = ata_sas_port_alloc(&ioa_cfg->ata_host, 
>> &sata_port_info, shost);
>> +        ap = ata_sas_port_alloc(&ioa_cfg->ata_host, &sata_port_info);
>>           if (ap) {
>>               spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
>>               sata_port->ioa_cfg = ioa_cfg;
>> diff --git a/drivers/scsi/libsas/sas_ata.c 
>> b/drivers/scsi/libsas/sas_ata.c
>> index 5d716d3..0cdfae9 100644
>> --- a/drivers/scsi/libsas/sas_ata.c
>> +++ b/drivers/scsi/libsas/sas_ata.c
>> @@ -549,7 +549,7 @@ int sas_ata_init(struct domain_device *found_dev)
>>         ata_host_init(ata_host, ha->dev, &sas_sata_ops);
>>   -    ap = ata_sas_port_alloc(ata_host, &sata_port_info, shost);
>> +    ap = ata_sas_port_alloc(ata_host, &sata_port_info);
>>       if (!ap) {
>>           pr_err("ata_sas_port_alloc failed.\n");
>>           rc = -ENODEV;
>> diff --git a/include/linux/libata.h b/include/linux/libata.h
>> index 8bf5e59..5a6fb80 100644
>> --- a/include/linux/libata.h
>> +++ b/include/linux/libata.h
>> @@ -1228,7 +1228,7 @@ extern int sata_link_scr_lpm(struct ata_link 
>> *link, enum ata_lpm_policy policy,
>>   extern int ata_slave_link_init(struct ata_port *ap);
>>   extern void ata_sas_port_destroy(struct ata_port *);
>>   extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
>> -                       struct ata_port_info *, struct Scsi_Host *);
>> +                       struct ata_port_info *);
>>   extern void ata_sas_async_probe(struct ata_port *ap);
>>   extern int ata_sas_sync_probe(struct ata_port *ap);
>>   extern int ata_sas_port_init(struct ata_port *);
>>
>
>
> .
>



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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-21  1:17 chenxiang
2020-05-21  7:23 ` John Garry
2020-05-22  3:23   ` chenxiang (M) [this message]

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