tree 1ccb90316de70e0085c6212e665d0573aa7e8347
parent fa222db0b036899cd4020a380568699ffb1de08d
author Xiang Chen <chenxiang66@hisilicon.com> 1525878649 +0800
committer Martin K. Petersen <martin.petersen@oracle.com> 1526656929 -0400

scsi: hisi_sas: Use device lock to protect slot alloc/free

The IPTT of a slot is unique, and we currently use hisi_hba lock to
protect it.

Now slot is managed on hisi_sas_device.list, so use DQ lock to protect
for allocating and freeing the slot.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>