linux-kernel - Re: [PATCH v7 4/7] scsi: mvsas: Add libsas SATA sysfs attributes group

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Date: Thu, 7 Mar 2024 12:35:44 -0800
From: Igor Pylypiv <ipylypiv@...gle.com>
To: Niklas Cassel <cassel@...nel.org>
Cc: Damien Le Moal <dlemoal@...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 v7 4/7] scsi: mvsas: Add libsas SATA sysfs attributes
 group

On Thu, Mar 07, 2024 at 10:52:08AM +0100, Niklas Cassel wrote:
> On Wed, Mar 06, 2024 at 01:13:22PM -0800, Igor Pylypiv wrote:
> > On Wed, Mar 06, 2024 at 11:55:19AM +0100, Niklas Cassel wrote:
> > > On Tue, Mar 05, 2024 at 05:22:23PM -0800, Igor Pylypiv wrote:
> > > > The added sysfs attributes group enables the configuration of NCQ Priority
> > > > feature for HBAs that rely on libsas to manage SATA devices.
> > > > 
> > > > 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>
> > > > ---
> > > >  drivers/scsi/mvsas/mv_init.c | 7 +++++++
> > > >  1 file changed, 7 insertions(+)
> > > > 
> > > > diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c
> > > > index 43ebb331e216..f1090bb5f2c9 100644
> > > > --- a/drivers/scsi/mvsas/mv_init.c
> > > > +++ b/drivers/scsi/mvsas/mv_init.c
> > > > @@ -26,6 +26,7 @@ static const struct mvs_chip_info mvs_chips[] = {
> > > >  };
> > > >  
> > > >  static const struct attribute_group *mvst_host_groups[];
> > > > +static const struct attribute_group *mvst_sdev_groups[];
> > > 
> > > I think you can remove this line.
> > >
> > I kept the forward declaration to match the mvst_host_groups style.
> > 
> > Perhaps mvs_sht can be moved to the bottom of the file so that all forward
> > declarations can be removed? This can be done in a separate cleanup patch
> > series.
> > 
> > I'll keep this and aic94xx patches as-is, unless there are objections.
> 
> Usually, you first do the cleanup, then you do your changes.
> (That way, there are fewer lines changed, since each patch is smaller.)
> 

Ack. I think it makes sense to wait for the John's patch series
"Add LIBSAS_SHT_BASE for libsas" to get merged first:
https://lore.kernel.org/linux-scsi/20240305122452.340471-1-john.g.garry@oracle.com/T/#t

This way John woudn't need to re-do the patches on top of the moved sht.
Since the LIBSAS_SHT_BASE reduces the line count the following cleanup
patches will have fewer lines changed.

> But no objection from me.
> 
> 
> Kind regards,
> Niklas
> 
> 
> > 
> > > 
> > > >  
> > > >  #define SOC_SAS_NUM 2
> > > >  
> > > > @@ -53,6 +54,7 @@ static const struct scsi_host_template mvs_sht = {
> > > >  	.compat_ioctl		= sas_ioctl,
> > > >  #endif
> > > >  	.shost_groups		= mvst_host_groups,
> > > > +	.sdev_groups		= mvst_sdev_groups,
> > > >  	.track_queue_depth	= 1,
> > > >  };
> > > >  
> > > > @@ -779,6 +781,11 @@ static struct attribute *mvst_host_attrs[] = {
> > > >  
> > > >  ATTRIBUTE_GROUPS(mvst_host);
> > > >  
> > > > +static const struct attribute_group *mvst_sdev_groups[] = {
> > > > +	&sas_ata_sdev_attr_group,
> > > > +	NULL
> > > > +};
> > > 
> > > ..and move these lines up to be after:
> > > static const struct attribute_group *mvst_host_groups[];
> > > 
> > > 
> > > > +
> > > >  module_init(mvs_init);
> > > >  module_exit(mvs_exit);
> > > >  
> > > > -- 
> > > > 2.44.0.278.ge034bb2e1d-goog
> > > >