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OpenCloudOS-Kernel
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target: Push target_submit_tmr LUN lookup failure to system_wq context 

In order to handle incoming target_submit_tmr() callers using interrupt
context, use system_wq process context for transport_lookup_tmr_lun()
failures to return TMR_LUN_DOES_NOT_EXIST status for fabric TM response.

Cc: Andy Grover <agrover@redhat.com>
Cc: Kiran Patil <kiran.patil@intel.com>
Cc: Arun Easi <arun.easi@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2012-02-25 05:02:48 -08:00
parent 00ad4c4e81
commit 9f0d05c2c6
1 changed files with 15 additions and 3 deletions
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18
drivers/target/target_core_transport.c
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@ -1694,6 +1694,15 @@ void target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess,
}
EXPORT_SYMBOL(target_submit_cmd);
static void target_complete_tmr_failure(struct work_struct *work)
{
struct se_cmd *se_cmd = container_of(work, struct se_cmd, work);
se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST;
se_cmd->se_tfo->queue_tm_rsp(se_cmd);
transport_generic_free_cmd(se_cmd, 0);
}
/**
* target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd
* for TMR CDBs
@ -1734,9 +1743,12 @@ int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun);
if (ret) {
se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST;
se_cmd->se_tfo->queue_tm_rsp(se_cmd);
transport_generic_free_cmd(se_cmd, 0);
/*
* For callback during failure handling, push this work off
* to process context with TMR_LUN_DOES_NOT_EXIST status.
*/
INIT_WORK(&se_cmd->work, target_complete_tmr_failure);
schedule_work(&se_cmd->work);
return 0;
}
transport_generic_handle_tmr(se_cmd);