linux-kernel - Re: [PATCH] scsi: mpi3mr: add explicit dependency on CONFIG_SCSI_SAS

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Date:   Mon, 17 Oct 2022 16:44:51 +0200
From:   Michal Kubecek <mkubecek@...e.cz>
To:     James Bottomley <James.Bottomley@...senPartnership.com>
Cc:     mpi3mr-linuxdrv.pdl@...adcom.com,
        Sathya Prakash Veerichetty <sathya.prakash@...adcom.com>,
        Kashyap Desai <kashyap.desai@...adcom.com>,
        Sumit Saxena <sumit.saxena@...adcom.com>,
        Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi: mpi3mr: add explicit dependency on
 CONFIG_SCSI_SAS_ATTRS

On Mon, Oct 17, 2022 at 10:13:58AM -0400, James Bottomley wrote:
> On Mon, 2022-10-17 at 16:05 +0200, Michal Kubecek wrote:
> > Starting with commit 42fc9fee116f ("scsi: mpi3mr: Add helper
> > functions to
> > manage device's port"), kernel configured with CONFIG_SCSI_MPI3MR=m
> > and
> > CONFIG_SCSI_SAS_ATTRS=n fails to build because modpost cannot find
> > symbols
> > used in mpi3mr_transport.c:
> > 
> >   ERROR: modpost: "sas_port_alloc_num"
> > [drivers/scsi/mpi3mr/mpi3mr.ko] undefined!
> >   ERROR: modpost: "sas_remove_host" [drivers/scsi/mpi3mr/mpi3mr.ko]
> > undefined!
> >   ERROR: modpost: "sas_phy_alloc" [drivers/scsi/mpi3mr/mpi3mr.ko]
> > undefined!
> >   ERROR: modpost: "sas_phy_free" [drivers/scsi/mpi3mr/mpi3mr.ko]
> > undefined!
> >   ...
> > 
> > Add an explicit dependency of CONFIG_SCSI_MPI3MR on
> > CONFIG_SCSI_SAS_ATTRS
> > to prevent inconsistent configs.
> > 
> > Fixes: 42fc9fee116f ("scsi: mpi3mr: Add helper functions to manage
> > device's port")
> > Signed-off-by: Michal Kubecek <mkubecek@...e.cz>
> > ---
> >  drivers/scsi/mpi3mr/Kconfig | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/scsi/mpi3mr/Kconfig
> > b/drivers/scsi/mpi3mr/Kconfig
> > index 8997531940c2..8ada8e8d25ac 100644
> > --- a/drivers/scsi/mpi3mr/Kconfig
> > +++ b/drivers/scsi/mpi3mr/Kconfig
> > @@ -2,7 +2,7 @@
> >  
> >  config SCSI_MPI3MR
> >  	tristate "Broadcom MPI3 Storage Controller Device Driver"
> > -	depends on PCI && SCSI
> > +	depends on PCI && SCSI && SCSI_SAS_ATTRS
> 
> This should probably be select not depends.
> 
> All transport attributes are designed to be selected.  The reason is to
> avoid people having to figure out what attributes they have to set in
> Kconfig before they see the HBAs they're interested in.

OK, I'll send v2 with select in a moment.

Michal