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qla2xxx: cleanup cmd in qla workqueue before processing TMR

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Since cmds go into qla_tgt_wq and TMRs don't, it's possible that TMR
like TASK_ABORT can be queued over the cmd for which it was meant.
To avoid this race, use a per-port list to keep track of cmds that
are enqueued to qla_tgt_wq but not yet processed. When a TMR arrives,
iterate through this list and remove any cmds that match the TMR.
This patch supports TASK_ABORT and LUN_RESET.

Cc: <stable@vger.kernel.org> # v3.18+
Signed-off-by: Swapnil Nagle <swapnil.nagle@purestorage.com>
Signed-off-by: Alexei Potashnik <alexei@purestorage.com>
Acked-by: Quinn Tran <quinn.tran@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Swapnil Nagle
2015-07-14 16:00:43 -04:00
committed by Nicholas Bellinger
parent b2032fd567
commit 8b2f5ff3d0
6 changed files with 140 additions and 13 deletions
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12
drivers/scsi/qla2xxx/qla_target.h
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@@ -874,6 +874,8 @@ struct qla_tgt_sess_op {
struct scsi_qla_host *vha;
struct atio_from_isp atio;
struct work_struct work;
struct list_head cmd_list;
bool aborted;
};
/*
@@ -1076,6 +1078,16 @@ static inline void qla_reverse_ini_mode(struct scsi_qla_host *ha)
ha->host->active_mode |= MODE_INITIATOR;
}
static inline uint32_t sid_to_key(const uint8_t *s_id)
{
uint32_t key;
key = (((unsigned long)s_id[0] << 16) |
((unsigned long)s_id[1] << 8) |
(unsigned long)s_id[2]);
return key;
}
/*
* Exported symbols from qla_target.c LLD logic used by qla2xxx code..
*/