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Date: Mon, 11 Nov 2019 19:28:14 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Yuliy Izrailov <yuliy.izrailov@....com>,
Avri Altman <avri.altman@....com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.3 112/193] scsi: ufs-bsg: Wake the device before sending raw upiu commands
From: Avri Altman <avri.altman@....com>
[ 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@....com>
Signed-off-by: Avri Altman <avri.altman@....com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/scsi/ufs/ufs_bsg.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/scsi/ufs/ufs_bsg.c b/drivers/scsi/ufs/ufs_bsg.c
index a9344eb4e047f..dc2f6d2b46edc 100644
--- 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;
--
2.20.1
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