[PATCH v2 03/14] qla2xxx: Allow vref count to timeout on vport delete.

[Himanshu Madhani]

From: Joe Carnuccio <joe.carnuc...@cavium.com>

Signed-off-by: Joe Carnuccio <joe.carnuc...@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madh...@cavium.com>
---
 drivers/scsi/qla2xxx/qla_attr.c |  4 +---
 drivers/scsi/qla2xxx/qla_mid.c  | 12 +++++++-----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index f610103..435ff7f 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -2154,8 +2154,6 @@ struct device_attribute *qla2x00_host_attrs[] = {
                    "Timer for the VP[%d] has stopped\n", vha->vp_idx);
        }
 
-       BUG_ON(atomic_read(&vha->vref_count));
-
        qla2x00_free_fcports(vha);
 
        mutex_lock(&ha->vport_lock);
@@ -2166,7 +2164,7 @@ struct device_attribute *qla2x00_host_attrs[] = {
        dma_free_coherent(&ha->pdev->dev, vha->gnl.size, vha->gnl.l,
            vha->gnl.ldma);
 
-       if (vha->qpair->vp_idx == vha->vp_idx) {
+       if (vha->qpair && vha->qpair->vp_idx == vha->vp_idx) {
                if (qla2xxx_delete_qpair(vha, vha->qpair) != QLA_SUCCESS)
                        ql_log(ql_log_warn, vha, 0x7087,
                            "Queue Pair delete failed.\n");
diff --git a/drivers/scsi/qla2xxx/qla_mid.c b/drivers/scsi/qla2xxx/qla_mid.c
index c6d6f0d..bf8e1e2 100644
--- a/drivers/scsi/qla2xxx/qla_mid.c
+++ b/drivers/scsi/qla2xxx/qla_mid.c
@@ -65,6 +65,7 @@
        uint16_t vp_id;
        struct qla_hw_data *ha = vha->hw;
        unsigned long flags = 0;
+       unsigned int count = 10;
 
        mutex_lock(&ha->vport_lock);
        /*
@@ -74,13 +75,14 @@
         * ensures no active vp_list traversal while the vport is removed
         * from the queue)
         */
-       spin_lock_irqsave(&ha->vport_slock, flags);
-       while (atomic_read(&vha->vref_count)) {
-               spin_unlock_irqrestore(&ha->vport_slock, flags);
-
+       while (count-- && atomic_read(&vha->vref_count))
                msleep(500);
 
-               spin_lock_irqsave(&ha->vport_slock, flags);
+       spin_lock_irqsave(&ha->vport_slock, flags);
+       if (atomic_read(&vha->vref_count)) {
+               ql_dbg(ql_dbg_vport, vha, 0xfffa,
+                   "vha->vref_count=%u timeout\n", vha->vref_count.counter);
+               vha->vref_count = (atomic_t)ATOMIC_INIT(0);
        }
        list_del(&vha->list);
        qlt_update_vp_map(vha, RESET_VP_IDX);
-- 
1.8.3.1