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Subject[PATCH 5.3 149/180] scsi: qla2xxx: Make sure that aborted commands are freed
Date
From: Bart Van Assche <bvanassche@acm.org>

[ Upstream commit 0dcec41acb85da33841c2ab56dbf337ed00a3914 ]

The LIO core requires that the target driver callback functions
.queue_data_in() and .queue_status() call target_put_sess_cmd() or
transport_generic_free_cmd(). These calls may happen synchronously or
asynchronously. Make sure that one of these LIO functions is called in case
a command has been aborted. This patch avoids that the code for removing a
session hangs due to commands that do not make progress.

Cc: Himanshu Madhani <hmadhani@marvell.com>
Fixes: 694833ee00c4 ("scsi: tcm_qla2xxx: Do not allow aborted cmd to advance.") # v4.13.
Fixes: a07100e00ac4 ("qla2xxx: Fix TMR ABORT interaction issue between qla2xxx and TCM") # v4.5.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/qla2xxx/qla_target.c | 13 ++++++++-----
drivers/scsi/qla2xxx/tcm_qla2xxx.c | 4 ++++
2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index 7c44f84a58e92..0b8ec4218d6bd 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -3237,7 +3237,8 @@ int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
(cmd->sess && cmd->sess->deleted)) {
cmd->state = QLA_TGT_STATE_PROCESSED;
- return 0;
+ res = 0;
+ goto free;
}

ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
@@ -3248,9 +3249,8 @@ int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,

res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
&full_req_cnt);
- if (unlikely(res != 0)) {
- return res;
- }
+ if (unlikely(res != 0))
+ goto free;

spin_lock_irqsave(qpair->qp_lock_ptr, flags);

@@ -3270,7 +3270,8 @@ int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
vha->flags.online, qla2x00_reset_active(vha),
cmd->reset_count, qpair->chip_reset);
spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
- return 0;
+ res = 0;
+ goto free;
}

/* Does F/W have an IOCBs for this request */
@@ -3373,6 +3374,8 @@ out_unmap_unlock:
qlt_unmap_sg(vha, cmd);
spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);

+free:
+ vha->hw->tgt.tgt_ops->free_cmd(cmd);
return res;
}
EXPORT_SYMBOL(qlt_xmit_response);
diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
index d15412d3d9bd2..0bb06e33ecab4 100644
--- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c
+++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
@@ -620,6 +620,7 @@ static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
{
struct qla_tgt_cmd *cmd = container_of(se_cmd,
struct qla_tgt_cmd, se_cmd);
+ struct scsi_qla_host *vha = cmd->vha;

if (cmd->aborted) {
/* Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
@@ -632,6 +633,7 @@ static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
cmd->se_cmd.transport_state,
cmd->se_cmd.t_state,
cmd->se_cmd.se_cmd_flags);
+ vha->hw->tgt.tgt_ops->free_cmd(cmd);
return 0;
}

@@ -659,6 +661,7 @@ static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
{
struct qla_tgt_cmd *cmd = container_of(se_cmd,
struct qla_tgt_cmd, se_cmd);
+ struct scsi_qla_host *vha = cmd->vha;
int xmit_type = QLA_TGT_XMIT_STATUS;

if (cmd->aborted) {
@@ -672,6 +675,7 @@ static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
cmd, kref_read(&cmd->se_cmd.cmd_kref),
cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
cmd->se_cmd.se_cmd_flags);
+ vha->hw->tgt.tgt_ops->free_cmd(cmd);
return 0;
}
cmd->bufflen = se_cmd->data_length;
--
2.20.1


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