On Tue, 2018-11-06 at 00:51 -0800, Himanshu Madhani wrote:
> From: Quinn Tran <quinn.tran@xxxxxxxxxx>
>
> This patch initializes port speed so that firmware does not
> set lower operating speed. Setting lower speed in firmware
> impacts WRITE perfomance.
>
> Fixes: 726b85487067 ("qla2xxx: Add framework for async fabric discovery")
> Cc: <stable@xxxxxxxxxxxxxxx>
> Singed-off-by: Quinn Tran <quinn.tran@xxxxxxxxxx>
> Signed-off-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
> Tested-by: Laurence Oberman <loberman@xxxxxxxxxx>
> ---
> Hi Martin,
>
> This patch fixes initialization issue for the driver which results into setting lower
> speed for WRITE transfer. In our latest experiments we have seen improvments of 47%
> for WRITE data
>
> Please apply this patch to 4.20/scsi-fixes for 4.20-rcX inclusion at your earliest convenience.
>
> Thanks,
> Himanshu
> ---
> drivers/scsi/qla2xxx/qla_init.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
> index 36d67230c3b1..92d2c6866e35 100644
> --- a/drivers/scsi/qla2xxx/qla_init.c
> +++ b/drivers/scsi/qla2xxx/qla_init.c
> @@ -4791,6 +4791,7 @@ qla2x00_alloc_fcport(scsi_qla_host_t *vha, gfp_t flags)
> fcport->loop_id = FC_NO_LOOP_ID;
> qla2x00_set_fcport_state(fcport, FCS_UNCONFIGURED);
> fcport->supported_classes = FC_COS_UNSPECIFIED;
> + fcport->fp_speed = PORT_SPEED_UNKNOWN;
>
> fcport->ct_desc.ct_sns = dma_alloc_coherent(&vha->hw->pdev->dev,
> sizeof(struct ct_sns_pkt), &fcport->ct_desc.ct_sns_dma,
Thanks Laurence for the bisect that found this...
Reviewed-by: Ewan D. Milne <emilne@xxxxxxxxxx>
