[PATCH AUTOSEL 5.12 045/104] scsi: qedi: Fix TMF session block/unblock use

From: Sasha Levin
Date: Fri Jul 09 2021 - 22:23:59 EST

From: Mike Christie <michael.christie@xxxxxxxxxx>

[ Upstream commit 2819b4ae2873d50fd55292877b0231ec936c3b2e ]

Drivers shouldn't be calling block/unblock session for tmf handling because
the functions can change the session state from under libiscsi.
iscsi_queuecommand's call to iscsi_prep_scsi_cmd_pdu->
iscsi_check_tmf_restrictions will prevent new cmds from being sent to qedi
after we've started handling a TMF. So we don't need to try and block it in
the driver, and we can remove these block calls.

Link: https://lore.kernel.org/r/20210525181821.7617-25-michael.christie@xxxxxxxxxx
Reviewed-by: Manish Rangankar <mrangankar@xxxxxxxxxxx>
Signed-off-by: Mike Christie <michael.christie@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
drivers/scsi/qedi/qedi_fw.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/scsi/qedi/qedi_fw.c b/drivers/scsi/qedi/qedi_fw.c
index c12bb2dd5ff9..4c87640e6a91 100644
--- a/drivers/scsi/qedi/qedi_fw.c
+++ b/drivers/scsi/qedi/qedi_fw.c
@@ -159,14 +159,9 @@ static void qedi_tmf_resp_work(struct work_struct *work)
set_bit(QEDI_CONN_FW_CLEANUP, &qedi_conn->flags);
resp_hdr_ptr = (struct iscsi_tm_rsp *)qedi_cmd->tmf_resp_buf;

- iscsi_block_session(session->cls_session);
rval = qedi_cleanup_all_io(qedi, qedi_conn, qedi_cmd->task, true);
- if (rval) {
- iscsi_unblock_session(session->cls_session);
+ if (rval)
goto exit_tmf_resp;
- }
- iscsi_unblock_session(session->cls_session);

__iscsi_complete_pdu(conn, (struct iscsi_hdr *)resp_hdr_ptr, NULL, 0);