linux-imx

scsi: hisi_sas: Terminate STP reject quickly for v2 hw

For v2 hw, STP link from target is rejected after host reset because of a
SoC bug. The STP reject will be terminated after we have sent IO from each
PHY of a port.

This is not an problem before, as we don't need to setup STP link from
target immediately after host reset. But now, it is.  Because we want to
send soft-reset immediately after host reset.

In order to terminate STP reject quickly, this patch send ATA reset command
through each PHY of a port. Notes: ATA reset command don't need target's
response.

Besides, we do abort dev for each device before terminating STP reject.
This is a quirk of v2 hw.

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>