[PATCH v2 13/15] qla2xxx: Fix driver unload when FC-NVMe LUNs are connected

[Himanshu Madhani <hmadhani@xxxxxxxxxxx>]

From: Giridhar Malavali <gmalavali@xxxxxxxxxxx>

This patch allows driver to unload using "modprobe -r" when
FC-NVMe LUNs are connected.

Signed-off-by: Giridhar Malavali <gmalavali@xxxxxxxxxxx>
Signed-off-by: Himanshu Madhani <hmadhani@xxxxxxxxxxx>
---
 drivers/scsi/qla2xxx/qla_nvme.c | 29 +++++++++++++++++++++++------
 drivers/scsi/qla2xxx/qla_os.c   |  6 ++++--
 2 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index 46c14bfecd4e..1ca63e80a7fe 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -164,12 +164,13 @@ static void qla_nvme_sp_done(void *ptr, int res)
 	if (!atomic_dec_and_test(&sp->ref_count))
 		return;
 
-	if (res == QLA_SUCCESS)
-		fd->status = 0;
-	else
-		fd->status = NVME_SC_INTERNAL;
-
-	fd->rcv_rsplen = nvme->u.nvme.rsp_pyld_len;
+	if (res == QLA_SUCCESS) {
+		fd->rcv_rsplen = nvme->u.nvme.rsp_pyld_len;
+	} else {
+		fd->rcv_rsplen = 0;
+		fd->transferred_length = 0;
+	}
+	fd->status = 0;
 	fd->done(fd);
 	qla2xxx_rel_qpair_sp(sp->qpair, sp);
 
@@ -193,6 +194,22 @@ static void qla_nvme_abort_work(struct work_struct *work)
 	if (!ha->flags.fw_started && (fcport && fcport->deleted))
 		return;
 
+	if (ha->flags.host_shutting_down) {
+		ql_log(ql_log_info, sp->fcport->vha, 0xffff,
+		    "%s Calling done on sp: %p, type: 0x%x, sp->ref_count: 0x%x\n",
+		    __func__, sp, sp->type, atomic_read(&sp->ref_count));
+		sp->done(sp, 0);
+		return;
+	}
+
+	if (atomic_read(&sp->ref_count) == 0) {
+		WARN_ON(1);
+		ql_log(ql_log_info, fcport->vha, 0xffff,
+			"%s: command alredy aborted on sp: %p\n",
+			__func__, sp);
+		return;
+	}
+
 	rval = ha->isp_ops->abort_command(sp);
 
 	ql_dbg(ql_dbg_io, fcport->vha, 0x212b,
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 0c9d2cc5fcc9..a702f90740d0 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -6742,8 +6742,10 @@ qla2x00_timer(struct timer_list *t)
 	 * FC-NVME
 	 * see if the active AEN count has changed from what was last reported.
 	 */
-	if (!vha->vp_idx && (atomic_read(&ha->nvme_active_aen_cnt) !=
-	    ha->nvme_last_rptd_aen) && ha->zio_mode == QLA_ZIO_MODE_6) {
+	if (!vha->vp_idx &&
+	    (atomic_read(&ha->nvme_active_aen_cnt) != ha->nvme_last_rptd_aen) &&
+	    ha->zio_mode == QLA_ZIO_MODE_6 &&
+	    !ha->flags.host_shutting_down) {
 		ql_log(ql_log_info, vha, 0x3002,
 		    "nvme: Sched: Set ZIO exchange threshold to %d.\n",
 		    ha->nvme_last_rptd_aen);
-- 
2.12.0