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Revert "qla2xxx: Fix incorrect tcm_qla2xxx_free_cmd use during TMR ABORT"

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This reverts commit 5f572526a1.

As reported by Pascal here:

http://www.spinics.net/lists/target-devel/msg15808.html

there still appears to be another issue related to this change
to drop the original bogus tcm_qla2xxx_free_cmd() usage from
tcm_qla2xxx_handle_data_work() and tcm_qla2xxx_aborted_task().

So revert this for now, until Pascal can verify with further
debug in place to understand what's going on.

Reported-by: Pascal de Bruijn <p.debruijn@unilogic.nl>
Cc: Pascal de Bruijn <p.debruijn@unilogic.nl>
Cc: Himanshu Madhani <himanshu.madhani@cavium.com>
Cc: Quinn Tran <quinn.tran@cavium.com>
Cc: <stable@vger.kernel.org> # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2017-07-11 10:50:00 -07:00
parent daf78c3051
commit 55dd8cf216
3 changed files with 33 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/scsi/qla2xxx/qla_target.c
View File

@ -4079,8 +4079,6 @@ static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
memset(cmd, 0, sizeof(struct qla_tgt_cmd));
init_completion(&cmd->write_pending_abort_comp);
memcpy(&cmd->atio, atio, sizeof(*atio));
cmd->state = QLA_TGT_STATE_NEW;
cmd->tgt = vha->vha_tgt.qla_tgt;
@ -5085,8 +5083,6 @@ qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
qlt_incr_num_pend_cmds(vha);
INIT_LIST_HEAD(&cmd->cmd_list);
init_completion(&cmd->write_pending_abort_comp);
memcpy(&cmd->atio, atio, sizeof(*atio));
cmd->tgt = vha->vha_tgt.qla_tgt;

1
drivers/scsi/qla2xxx/qla_target.h
View File

@ -868,7 +868,6 @@ struct qla_tgt_cmd {
unsigned char sense_buffer[TRANSPORT_SENSE_BUFFER];
spinlock_t cmd_lock;
struct completion write_pending_abort_comp;
/* to save extra sess dereferences */
unsigned int conf_compl_supported:1;
unsigned int sg_mapped:1;

36
drivers/scsi/qla2xxx/tcm_qla2xxx.c
View File

@ -415,7 +415,6 @@ static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
{
struct qla_tgt_cmd *cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
unsigned long flags;
/*
* Check for WRITE_PENDING status to determine if we need to wait for
@ -425,7 +424,8 @@ static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
wait_for_completion(&cmd->write_pending_abort_comp);
wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
50);
return 0;
}
spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
@ -501,6 +501,7 @@ static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
{
struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
unsigned long flags;
/*
* Ensure that the complete FCP WRITE payload has been received.
@ -508,6 +509,17 @@ static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
*/
cmd->cmd_in_wq = 0;
spin_lock_irqsave(&cmd->cmd_lock, flags);
cmd->data_work = 1;
if (cmd->aborted) {
cmd->data_work_free = 1;
spin_unlock_irqrestore(&cmd->cmd_lock, flags);
tcm_qla2xxx_free_cmd(cmd);
return;
}
spin_unlock_irqrestore(&cmd->cmd_lock, flags);
cmd->vha->tgt_counters.qla_core_ret_ctio++;
if (!cmd->write_data_transferred) {
/*
@ -515,7 +527,7 @@ static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
* waiting upon completion in tcm_qla2xxx_write_pending_status()
*/
if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
complete(&cmd->write_pending_abort_comp);
complete(&cmd->se_cmd.t_transport_stop_comp);
return;
}
@ -741,13 +753,31 @@ static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
qlt_xmit_tm_rsp(mcmd);
}
#define DATA_WORK_NOT_FREE(_cmd) (_cmd->data_work && !_cmd->data_work_free)
static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
{
struct qla_tgt_cmd *cmd = container_of(se_cmd,
struct qla_tgt_cmd, se_cmd);
unsigned long flags;
if (qlt_abort_cmd(cmd))
return;
spin_lock_irqsave(&cmd->cmd_lock, flags);
if ((cmd->state == QLA_TGT_STATE_NEW)||
((cmd->state == QLA_TGT_STATE_DATA_IN) &&
DATA_WORK_NOT_FREE(cmd))) {
cmd->data_work_free = 1;
spin_unlock_irqrestore(&cmd->cmd_lock, flags);
/*
* cmd has not reached fw, Use this trigger to free it.
*/
tcm_qla2xxx_free_cmd(cmd);
return;
}
spin_unlock_irqrestore(&cmd->cmd_lock, flags);
return;
}
static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,