Re: [PATCH 15/15] hisi_sas: send three identify before phy up

[Hannes Reinecke]

On 09/06/2016 05:36 PM, John Garry wrote:
> When the v2 hw is attached with many disks through
> an expander, there may be OOB reset resulting in a PHY
> going down after the speed is negotiated (very low
> probability).
> 
> This issue is resolved by modifying the link control
> registers to send three identify frames before the PHY
> is ready (according to 6.10.3.3.2 in SAS 3.0 spec) and
> close ready when the PHY is down.
> 
> Signed-off-by: NengLong Zhao <zhaonenglong@xxxxxxxxxxxxx>
> Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
> ---
>  drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 20 ++++++++++++++++----
>  1 file changed, 16 insertions(+), 4 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@xxxxxxxx>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
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