target: Remove core TRANSPORT_FREE_CMD_INTR usage

This patch drops TRANSPORT_FREE_CMD_INTR usage from target core, which
includes the removal of transport_generic_free_cmd_intr() symbol,
TRANSPORT_FREE_CMD_INTR usage in transport_processing_thread(), and
special case LUN_RESET handling to skip TRANSPORT_FREE_CMD_INTR processing
in core_tmr_drain_cmd_list().  We now expect that fabric modules will
use an internal workqueue to provide process context when releasing
se_cmd descriptor resources via transport_generic_free_cmd().

Reported-by: Christoph Hellwig <hch@lst.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@purestorage.com>
Cc: Madhuranath Iyengar <mni@risingtidesystems.com>
Signed-off-by: Nicholas Bellinger <nab@risingtidesystems.com>

4 files changed, 0 insertions, 22 deletions

diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c
index b1b9f2d6f935..1d2aaba3f372 100644
--- a/drivers/target/target_core_tmr.c
+++ b/drivers/target/target_core_tmr.c
@@ -329,16 +329,6 @@ static void core_tmr_drain_cmd_list(
                  */
                 if (prout_cmd == cmd)
                         continue;
-                /*
-                 * Skip direct processing of TRANSPORT_FREE_CMD_INTR for
-                 * HW target mode fabrics.
-                 */
-                spin_lock(&cmd->t_state_lock);
-                if (cmd->t_state == TRANSPORT_FREE_CMD_INTR) {
-                        spin_unlock(&cmd->t_state_lock);
-                        continue;
-                }
-                spin_unlock(&cmd->t_state_lock);
 
                 atomic_set(&cmd->t_transport_queue_active, 0);
                 atomic_dec(&qobj->queue_cnt);
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index bf8867f44021..64ee3342e0c2 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1718,13 +1718,6 @@ int transport_generic_handle_tmr(
 }
 EXPORT_SYMBOL(transport_generic_handle_tmr);
 
-void transport_generic_free_cmd_intr(
-        struct se_cmd *cmd)
-{
-        transport_add_cmd_to_queue(cmd, TRANSPORT_FREE_CMD_INTR, false);
-}
-EXPORT_SYMBOL(transport_generic_free_cmd_intr);
-
 /*
  * If the task is active, request it to be stopped and sleep until it
  * has completed.
@@ -4597,9 +4590,6 @@ get_cmd:
                 case TRANSPORT_PROCESS_WRITE:
                         transport_generic_process_write(cmd);
                         break;
-                case TRANSPORT_FREE_CMD_INTR:
-                        transport_generic_free_cmd(cmd, 0);
-                        break;
                 case TRANSPORT_PROCESS_TMR:
                         transport_generic_do_tmr(cmd);
                         break;
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 35aa786f93da..d571bcfd16ad 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -89,7 +89,6 @@ enum transport_state_table {
         TRANSPORT_PROCESS_TMR   = 9,
         TRANSPORT_ISTATE_PROCESSING = 11,
         TRANSPORT_NEW_CMD_MAP   = 16,
-        TRANSPORT_FREE_CMD_INTR = 17,
         TRANSPORT_COMPLETE_QF_WP = 18,
         TRANSPORT_COMPLETE_QF_OK = 19,
 };
diff --git a/include/target/target_core_transport.h b/include/target/target_core_transport.h
index a037a1a6fbba..d1b68c9ccb75 100644
--- a/include/target/target_core_transport.h
+++ b/include/target/target_core_transport.h
@@ -160,7 +160,6 @@ extern int transport_generic_handle_cdb_map(struct se_cmd *);
 extern int transport_generic_handle_data(struct se_cmd *);
 extern void transport_new_cmd_failure(struct se_cmd *);
 extern int transport_generic_handle_tmr(struct se_cmd *);
-extern void transport_generic_free_cmd_intr(struct se_cmd *);
 extern bool target_stop_task(struct se_task *task, unsigned long *flags);
 extern int transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *, u32,
                                 struct scatterlist *, u32);