linux-kernel - Re: [PATCH v8 2/7] scsi: libsas: Define NCQ Priority sysfs attributes for SATA devices

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Date: Tue, 26 Mar 2024 20:52:39 +0900
From: Damien Le Moal <dlemoal@...nel.org>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Igor Pylypiv <ipylypiv@...gle.com>, Niklas Cassel <cassel@...nel.org>,
 John Garry <john.g.garry@...cle.com>, Jason Yan <yanaijie@...wei.com>,
 "James E.J. Bottomley" <jejb@...ux.ibm.com>,
 "Martin K. Petersen" <martin.petersen@...cle.com>,
 Jack Wang <jinpu.wang@...ud.ionos.com>, Hannes Reinecke <hare@...e.de>,
 Xiang Chen <chenxiang66@...ilicon.com>,
 Artur Paszkiewicz <artur.paszkiewicz@...el.com>,
 Bart Van Assche <bvanassche@....org>, TJ Adams <tadamsjr@...gle.com>,
 linux-ide@...r.kernel.org, linux-scsi@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 2/7] scsi: libsas: Define NCQ Priority sysfs attributes
 for SATA devices

On 3/26/24 19:16, Geert Uytterhoeven wrote:
> Hi Damien,
> 
> On Tue, Mar 26, 2024 at 11:07 AM Damien Le Moal <dlemoal@...nel.org> wrote:
>> On 3/26/24 18:53, Geert Uytterhoeven wrote:
>>> On Thu, Mar 7, 2024 at 10:55 PM Igor Pylypiv <ipylypiv@...gle.com> wrote:
>>>> Libata sysfs attributes cannot be used for libsas managed SATA devices
>>>> because the ata_port location is different for libsas.
>>>>
>>>> Defined sysfs attributes (visible for SATA devices only):
>>>> - /sys/block/sda/device/ncq_prio_enable
>>>> - /sys/block/sda/device/ncq_prio_supported
>>>>
>>>> The newly defined attributes will pass the correct ata_port to libata
>>>> helper functions.
>>>>
>>>> Reviewed-by: John Garry <john.g.garry@...cle.com>
>>>> Reviewed-by: Damien Le Moal <dlemoal@...nel.org>
>>>> Reviewed-by: Jason Yan <yanaijie@...wei.com>
>>>> Signed-off-by: Igor Pylypiv <ipylypiv@...gle.com>
>>>
>>> Thanks for your patch, which is now commit b4d3ddd2df7531e3 ("scsi:
>>> libsas: Define NCQ Priority sysfs attributes for SATA devices")
>>> in scsi-mkp/for-next
>>>
>>>> --- a/drivers/scsi/libsas/sas_ata.c
>>>> +++ b/drivers/scsi/libsas/sas_ata.c
>>>
>>>> +
>>>> +DEVICE_ATTR(ncq_prio_supported, S_IRUGO, sas_ncq_prio_supported_show, NULL);
>>>> +
>>>
>>> [...]
>>>
>>>> +
>>>> +DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
>>>> +           sas_ncq_prio_enable_show, sas_ncq_prio_enable_store);
>>>> +
>>>
>>> When both CONFIG_SCSI_SAS_ATA and CONFIG_SATA_HOST are enabled:
>>
>> I have both enabled in my config and I do not see any issue. What is special
>> with these on ARM ?
> 
> Modular or built-in?
> I have them built-in, and it fails on arm64 (with renesas_defconfig,
> which is not upstream).
> It also fails with shmobile_defconfig on arm32, after manually adding
> CONFIG_SCSI_SAS_LIBSAS=y and CONFIG_SCSI_SAS_ATA=y.

Hmm... That must be it. I did a modular build.
Will check that again and send a fix. Thanks.

-- 
Damien Le Moal
Western Digital Research