linux-kernel - Re: [PATCH 4.7 122/141] scsi: ses: use scsi_is_sas_rphy instead of is_sas

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Date:   Thu, 06 Oct 2016 21:25:34 +0800
From:   James Bottomley <jejb@...ux.vnet.ibm.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Cc:     stable@...r.kernel.org, Johannes Thumshirn <jthumshirn@...e.de>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: Re: [PATCH 4.7 122/141] scsi: ses: use scsi_is_sas_rphy instead of
 is_sas_attached

On Thu, 2016-10-06 at 10:29 +0200, Greg Kroah-Hartman wrote:
> 4.7-stable review patch.  If anyone has any objections, please let me
> know.

This doesn't build if SCSI_SAS_ATTRS isn't set without this patch:


commit c1a23f6d64552b4480208aa584ec7e9c13d6d9c3
Author: Johannes Thumshirn <jthumshirn@...e.de>
Date:   Wed Aug 17 11:46:16 2016 +0200

    scsi: sas: provide stub implementation for scsi_is_sas_rphy
    
Does it?

James



> ------------------
> 
> From: Johannes Thumshirn <jthumshirn@...e.de>
> 
> commit 835831c57e9b0cccc24e96a812542875471d75b5 upstream.
> 
> Use scsi_is_sas_rphy() instead of is_sas_attached() to decide whether
> we
> should obtain the SAS address from a scsi device or not. This will
> prevent us from tripping on the BUG_ON() in sas_sdev_to_rdev() if the
> rphy isn't attached to the SAS transport class, like it is with
> hpsa's
> logical devices.
> 
> Fixes: 3f8d6f2a0 ('ses: fix discovery of SATA devices in SAS
> enclosures')
> Signed-off-by: Johannes Thumshirn <jthumshirn@...e.de>
> Reviewed-by: James E.J. Bottomley <jejb@...ux.vnet.ibm.com>
> Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> 
> ---
>  drivers/scsi/ses.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- a/drivers/scsi/ses.c
> +++ b/drivers/scsi/ses.c
> @@ -587,7 +587,7 @@ static void ses_match_to_enclosure(struc
> 
>  	ses_enclosure_data_process(edev, to_scsi_device(edev
> ->edev.parent), 0);
> 
> -	if (is_sas_attached(sdev))
> +	if (scsi_is_sas_rphy(&sdev->sdev_gendev))
>  		efd.addr = sas_get_address(sdev);
> 
>  	if (efd.addr) {
> 
>