target: Export transport_generic_request_failure symbol

transport_generic_request_failure() is a wrapper around calling
transport_send_check_condition_and_sense() that is required once
an se_cmd->cmd_kref has been obtained via target_submit_cmd() ->
target_get_sess_cmd().

tcm_qla2xxx currently requires this, and since it's necessary for
other callers using target_submit_cmd() make it exportable now.

Reported-by: Roland Dreier <roland@purestorage.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/target_core_transport.c

@@ -76,7 +76,6 @@ static int transport_generic_get_mem(struct se_cmd *cmd);
 static void transport_put_cmd(struct se_cmd *cmd);
 static void transport_remove_cmd_from_queue(struct se_cmd *cmd);
 static int transport_set_sense_codes(struct se_cmd *cmd, u8 asc, u8 ascq);
-static void transport_generic_request_failure(struct se_cmd *);
 static void target_complete_ok_work(struct work_struct *work);
 
 int init_se_kmem_caches(void)
@@ -1866,7 +1865,7 @@ static int transport_stop_tasks_for_cmd(struct se_cmd *cmd)
 /*
  * Handle SAM-esque emulation for generic transport request failures.
  */
-static void transport_generic_request_failure(struct se_cmd *cmd)
+void transport_generic_request_failure(struct se_cmd *cmd)
 {
 	int ret = 0;
 
@@ -1958,6 +1957,7 @@ static void transport_generic_request_failure(struct se_cmd *cmd)
 	cmd->t_state = TRANSPORT_COMPLETE_QF_OK;
 	transport_handle_queue_full(cmd, cmd->se_dev);
 }
+EXPORT_SYMBOL(transport_generic_request_failure);
 
 static inline u32 transport_lba_21(unsigned char *cdb)
 {

include/target/target_core_fabric.h

@@ -145,6 +145,7 @@ int	core_alua_check_nonop_delay(struct se_cmd *);
 int	core_tmr_alloc_req(struct se_cmd *, void *, u8, gfp_t);
 void	core_tmr_release_req(struct se_tmr_req *);
 int	transport_generic_handle_tmr(struct se_cmd *);
+void	transport_generic_request_failure(struct se_cmd *);
 int	transport_lookup_tmr_lun(struct se_cmd *, u32);
 
 struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,