tree 69d7bc84cab8c009f2c0f62eb1fdf3a790c9f99d
parent 56cc74b9999ff0059007626ef8fab031033a166b
author John Garry <john.garry@huawei.com> 1473176185 +0800
committer Martin K. Petersen <martin.petersen@oracle.com> 1473872058 -0400

scsi: hisi_sas: send three identify before phy up

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@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>