target/tcm_loop: Use target_submit_tmr() instead of open-coding this function

Use target_submit_tmr() instead of open-coding this function. The
only functional change is that TMFs are now added to sess_cmd_list,
something the current code does not do. This behavior change is a
bug fix because it makes LUN RESETs wait for other TMFs that are in
progress for the same LUN.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: David Disseldorp <ddiss@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 3 insertions, 29 deletions

diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index 27f912747113..8cf556b4c5ca 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -218,7 +218,6 @@ static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg,
 {
         struct se_cmd *se_cmd = NULL;
         struct se_session *se_sess;
-        struct se_portal_group *se_tpg;
         struct tcm_loop_nexus *tl_nexus;
         struct tcm_loop_cmd *tl_cmd = NULL;
         int ret = TMR_FUNCTION_FAILED, rc;
@@ -242,40 +241,15 @@ static int tcm_loop_issue_tmr(struct tcm_loop_tpg *tl_tpg,
         init_completion(&tl_cmd->tmr_done);
 
         se_cmd = &tl_cmd->tl_se_cmd;
-        se_tpg = &tl_tpg->tl_se_tpg;
         se_sess = tl_tpg->tl_nexus->se_sess;
-        /*
-         * Initialize struct se_cmd descriptor from target_core_mod infrastructure
-         */
-        transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess, 0,
-                                DMA_NONE, TCM_SIMPLE_TAG,
-                                &tl_cmd->tl_sense_buf[0]);
 
-        rc = core_tmr_alloc_req(se_cmd, NULL, tmr, GFP_KERNEL);
+        rc = target_submit_tmr(se_cmd, se_sess, tl_cmd->tl_sense_buf, lun,
+                               NULL, tmr, GFP_KERNEL, task, 0 /*flags*/);
         if (rc < 0)
                 goto release;
-
-        if (tmr == TMR_ABORT_TASK)
-                se_cmd->se_tmr_req->ref_task_tag = task;
-
-        /*
-         * Locate the underlying TCM struct se_lun
-         */
-        if (transport_lookup_tmr_lun(se_cmd, lun) < 0) {
-                ret = TMR_LUN_DOES_NOT_EXIST;
-                goto release;
-        }
-        /*
-         * Queue the TMR to TCM Core and sleep waiting for
-         * tcm_loop_queue_tm_rsp() to wake us up.
-         */
-        transport_generic_handle_tmr(se_cmd);
         wait_for_completion(&tl_cmd->tmr_done);
-        /*
-         * The TMR LUN_RESET has completed, check the response status and
-         * then release allocations.
-         */
         ret = se_cmd->se_tmr_req->response;
+
 release:
         if (se_cmd)
                 transport_generic_free_cmd(se_cmd, 1);