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>
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 96e78f3..ca1a40d 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1694,6 +1694,15 @@
}
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 @@
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);