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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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5
drivers/scsi/qla2xxx/qla_def.h
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@@ -3579,6 +3579,11 @@ typedef struct scsi_qla_host {
uint16_t fcoe_fcf_idx;
uint8_t fcoe_vn_port_mac[6];
/* list of commands waiting on workqueue */
struct list_head qla_cmd_list;
struct list_head qla_sess_op_cmd_list;
spinlock_t cmd_list_lock;
uint32_t vp_abort_cnt;
struct fc_vport *fc_vport; /* holds fc_vport * for each vport */