scsi: ufs-bsg: Wake the device before sending raw upiu commands

[ Upstream commit 74e5e468b664d3739b2872d54764af97ac38e795 ]

The scsi async probe process is calling blk_pm_runtime_init for each lun,
and then those request queues are monitored by the block layer pm
engine (blk-pm.c).  This is however, not the case for scsi-passthrough
queues, created by bsg_setup_queue().

So the ufs-bsg driver might send various commands, disregarding the pm
status of the device. This is wrong, regardless if its request queue is
pm-aware or not.

Fixes: df032bf27a41 (scsi: ufs: Add a bsg endpoint that supports UPIUs)
Link: https://lore.kernel.org/r/1570696267-8487-1-git-send-email-avri.altman@wdc.com
Reported-by: Yuliy Izrailov <yuliy.izrailov@wdc.com>
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/scsi/ufs/ufs_bsg.c b/drivers/scsi/ufs/ufs_bsg.c
index a9344eb4e047f1e73c28212024c1e8dcefb19228..dc2f6d2b46edc306f8696cd4471358a86dd6df49 100644 (file)
--- a/drivers/scsi/ufs/ufs_bsg.c
+++ b/drivers/scsi/ufs/ufs_bsg.c
@@ -98,6 +98,8 @@ static int ufs_bsg_request(struct bsg_job *job)
 
        bsg_reply->reply_payload_rcv_len = 0;
 
+       pm_runtime_get_sync(hba->dev);
+
        msgcode = bsg_request->msgcode;
        switch (msgcode) {
        case UPIU_TRANSACTION_QUERY_REQ:
@@ -135,6 +137,8 @@ static int ufs_bsg_request(struct bsg_job *job)
                break;
        }
 
+       pm_runtime_put_sync(hba->dev);
+
        if (!desc_buff)
                goto out;