This is a note to let you know that I've just added the patch titled
qla2xxx: Allow vref count to timeout on vport delete.
to the 4.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
qla2xxx-allow-vref-count-to-timeout-on-vport-delete.patch
and it can be found in the queue-4.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c4a9b538ab2a109c5f9798bea1f8f4bf93aadfb9 Mon Sep 17 00:00:00 2001
From: Joe Carnuccio <joe.carnuccio@xxxxxxxxxx>
Date: Wed, 15 Mar 2017 09:48:43 -0700
Subject: qla2xxx: Allow vref count to timeout on vport delete.
From: Joe Carnuccio <joe.carnuccio@xxxxxxxxxx>
commit c4a9b538ab2a109c5f9798bea1f8f4bf93aadfb9 upstream.
Signed-off-by: Joe Carnuccio <joe.carnuccio@xxxxxxxxxx>
Signed-off-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/qla2xxx/qla_attr.c | 4 +---
drivers/scsi/qla2xxx/qla_def.h | 6 +++++-
drivers/scsi/qla2xxx/qla_init.c | 1 +
drivers/scsi/qla2xxx/qla_mid.c | 14 ++++++++------
drivers/scsi/qla2xxx/qla_os.c | 1 +
5 files changed, 16 insertions(+), 10 deletions(-)
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -2154,8 +2154,6 @@ qla24xx_vport_delete(struct fc_vport *fc
"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);
@@ -2163,7 +2161,7 @@ qla24xx_vport_delete(struct fc_vport *fc
clear_bit(vha->vp_idx, ha->vp_idx_map);
mutex_unlock(&ha->vport_lock);
- 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");
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -3788,6 +3788,7 @@ typedef struct scsi_qla_host {
struct qla8044_reset_template reset_tmplt;
struct qla_tgt_counters tgt_counters;
uint16_t bbcr;
+ wait_queue_head_t vref_waitq;
} scsi_qla_host_t;
struct qla27xx_image_status {
@@ -3843,14 +3844,17 @@ struct qla2_sgx {
mb(); \
if (__vha->flags.delete_progress) { \
atomic_dec(&__vha->vref_count); \
+ wake_up(&__vha->vref_waitq); \
__bail = 1; \
} else { \
__bail = 0; \
} \
} while (0)
-#define QLA_VHA_MARK_NOT_BUSY(__vha) \
+#define QLA_VHA_MARK_NOT_BUSY(__vha) do { \
atomic_dec(&__vha->vref_count); \
+ wake_up(&__vha->vref_waitq); \
+} while (0) \
#define QLA_QPAIR_MARK_BUSY(__qpair, __bail) do { \
atomic_inc(&__qpair->ref_count); \
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -4352,6 +4352,7 @@ qla2x00_update_fcports(scsi_qla_host_t *
}
}
atomic_dec(&vha->vref_count);
+ wake_up(&vha->vref_waitq);
}
spin_unlock_irqrestore(&ha->vport_slock, flags);
}
--- a/drivers/scsi/qla2xxx/qla_mid.c
+++ b/drivers/scsi/qla2xxx/qla_mid.c
@@ -74,13 +74,14 @@ qla24xx_deallocate_vp_id(scsi_qla_host_t
* 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);
-
- msleep(500);
+ wait_event_timeout(vha->vref_waitq, atomic_read(&vha->vref_count),
+ 10*HZ);
- 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);
@@ -269,6 +270,7 @@ qla2x00_alert_all_vps(struct rsp_que *rs
spin_lock_irqsave(&ha->vport_slock, flags);
atomic_dec(&vha->vref_count);
+ wake_up(&vha->vref_waitq);
}
i++;
}
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -4215,6 +4215,7 @@ struct scsi_qla_host *qla2x00_create_hos
spin_lock_init(&vha->work_lock);
spin_lock_init(&vha->cmd_list_lock);
+ init_waitqueue_head(&vha->vref_waitq);
sprintf(vha->host_str, "%s_%ld", QLA2XXX_DRIVER_NAME, vha->host_no);
ql_dbg(ql_dbg_init, vha, 0x0041,
Patches currently in stable-queue which might be from joe.carnuccio@xxxxxxxxxx are
queue-4.10/qla2xxx-allow-vref-count-to-timeout-on-vport-delete.patch