Re: [PATCH v6 3/8] scsi: pm8001: use sas_find_attached_phy_id() instead of open coded

From: Damien Le Moal <damien.lemoal@opensource.wdc.com>
To: Jason Yan <yanaijie@huawei.com>,
	martin.petersen@oracle.com, jejb@linux.ibm.com
Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
	hare@suse.com, hch@lst.de, bvanassche@acm.org,
	john.garry@huawei.com, jinpu.wang@cloud.ionos.com,
	Jack Wang <jinpu.wang@ionos.com>
Subject: Re: [PATCH v6 3/8] scsi: pm8001: use sas_find_attached_phy_id() instead of open coded
Date: Wed, 28 Sep 2022 16:02:21 +0900	[thread overview]
Message-ID: <e3bfbe7e-baee-9f4a-7d55-c6dc27e3eba1@opensource.wdc.com> (raw)
In-Reply-To: <20220928070130.3657183-4-yanaijie@huawei.com>

On 9/28/22 16:01, Jason Yan wrote:
> The attached phy id finding is open coded. Now we can replace it with
> sas_find_attached_phy_id(). To keep consistent, the return value of
> pm8001_dev_found_notify() is also changed to -ENODEV after calling
> sas_find_attathed_phy_id() failed.
> 
> Signed-off-by: Jason Yan <yanaijie@huawei.com>
> Reviewed-by: Jack Wang <jinpu.wang@ionos.com>
> Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

Looks good.

Note for future patches: if you change a patch, it needs to be reviewed
again. So please drop any review tag from the patch commit message to make
that clear.

> ---
>  drivers/scsi/pm8001/pm8001_sas.c | 18 ++++++------------
>  1 file changed, 6 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
> index 8e3f2f9ddaac..b4007c4f157d 100644
> --- a/drivers/scsi/pm8001/pm8001_sas.c
> +++ b/drivers/scsi/pm8001/pm8001_sas.c
> @@ -645,22 +645,16 @@ static int pm8001_dev_found_notify(struct domain_device *dev)
>  	pm8001_device->dcompletion = &completion;
>  	if (parent_dev && dev_is_expander(parent_dev->dev_type)) {
>  		int phy_id;
> -		struct ex_phy *phy;
> -		for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
> -		phy_id++) {
> -			phy = &parent_dev->ex_dev.ex_phy[phy_id];
> -			if (SAS_ADDR(phy->attached_sas_addr)
> -				== SAS_ADDR(dev->sas_addr)) {
> -				pm8001_device->attached_phy = phy_id;
> -				break;
> -			}
> -		}
> -		if (phy_id == parent_dev->ex_dev.num_phys) {
> +
> +		phy_id = sas_find_attached_phy_id(&parent_dev->ex_dev, dev);
> +		if (phy_id < 0) {
>  			pm8001_dbg(pm8001_ha, FAIL,
>  				   "Error: no attached dev:%016llx at ex:%016llx.\n",
>  				   SAS_ADDR(dev->sas_addr),
>  				   SAS_ADDR(parent_dev->sas_addr));
> -			res = -1;
> +			res = phy_id;
> +		} else {
> +			pm8001_device->attached_phy = phy_id;
>  		}
>  	} else {
>  		if (dev->dev_type == SAS_SATA_DEV) {

-- 
Damien Le Moal
Western Digital Research