[SCSI] libiscsi: add debug printks for iscsi command completion path

This patch just adds some debug statements for the abort
and completion paths.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index b00be6c..59908ae 100644 (file)
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -393,10 +393,12 @@ static void iscsi_free_task(struct iscsi_task *task)
        struct iscsi_session *session = conn->session;
        struct scsi_cmnd *sc = task->sc;
 
+       ISCSI_DBG_SESSION(session, "freeing task itt 0x%x state %d sc %p\n",
+                         task->itt, task->state, task->sc);
+
        session->tt->cleanup_task(task);
        task->state = ISCSI_TASK_FREE;
        task->sc = NULL;
-
        /*
         * login task is preallocated so do not free
         */
@@ -451,6 +453,9 @@ static void iscsi_complete_task(struct iscsi_task *task, int state)
 {
        struct iscsi_conn *conn = task->conn;
 
+       ISCSI_DBG_SESSION(conn->session,
+                         "complete task itt 0x%x state %d sc %p\n",
+                         task->itt, task->state, task->sc);
        if (task->state == ISCSI_TASK_COMPLETED ||
            task->state == ISCSI_TASK_ABRT_TMF ||
            task->state == ISCSI_TASK_ABRT_SESS_RECOV)
@@ -1836,6 +1841,8 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
        cls_session = starget_to_session(scsi_target(sc->device));
        session = cls_session->dd_data;
 
+       ISCSI_DBG_SESSION(session, "aborting sc %p\n", sc);
+
        mutex_lock(&session->eh_mutex);
        spin_lock_bh(&session->lock);
        /*
@@ -1858,6 +1865,8 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
            sc->SCp.phase != session->age) {
                spin_unlock_bh(&session->lock);
                mutex_unlock(&session->eh_mutex);
+               ISCSI_DBG_SESSION(session, "failing abort due to dropped "
+                                 "session.\n");
                return FAILED;
        }