diff options
Diffstat (limited to 'drivers/scsi/libiscsi.c')
| -rw-r--r-- | drivers/scsi/libiscsi.c | 41 |
1 files changed, 33 insertions, 8 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 78de36250b31..73d235540b98 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -83,7 +83,7 @@ MODULE_PARM_DESC(debug_libiscsi_eh, "%s " dbg_fmt, __func__, ##arg); \ } while (0); -inline void iscsi_conn_queue_work(struct iscsi_conn *conn) +inline void iscsi_conn_queue_xmit(struct iscsi_conn *conn) { struct Scsi_Host *shost = conn->session->host; struct iscsi_host *ihost = shost_priv(shost); @@ -91,7 +91,17 @@ inline void iscsi_conn_queue_work(struct iscsi_conn *conn) if (ihost->workq) queue_work(ihost->workq, &conn->xmitwork); } -EXPORT_SYMBOL_GPL(iscsi_conn_queue_work); +EXPORT_SYMBOL_GPL(iscsi_conn_queue_xmit); + +inline void iscsi_conn_queue_recv(struct iscsi_conn *conn) +{ + struct Scsi_Host *shost = conn->session->host; + struct iscsi_host *ihost = shost_priv(shost); + + if (ihost->workq && !test_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags)) + queue_work(ihost->workq, &conn->recvwork); +} +EXPORT_SYMBOL_GPL(iscsi_conn_queue_recv); static void __iscsi_update_cmdsn(struct iscsi_session *session, uint32_t exp_cmdsn, uint32_t max_cmdsn) @@ -765,7 +775,7 @@ __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr, goto free_task; } else { list_add_tail(&task->running, &conn->mgmtqueue); - iscsi_conn_queue_work(conn); + iscsi_conn_queue_xmit(conn); } return task; @@ -1513,7 +1523,7 @@ void iscsi_requeue_task(struct iscsi_task *task) */ iscsi_put_task(task); } - iscsi_conn_queue_work(conn); + iscsi_conn_queue_xmit(conn); spin_unlock_bh(&conn->session->frwd_lock); } EXPORT_SYMBOL_GPL(iscsi_requeue_task); @@ -1782,7 +1792,7 @@ int iscsi_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc) } } else { list_add_tail(&task->running, &conn->cmdqueue); - iscsi_conn_queue_work(conn); + iscsi_conn_queue_xmit(conn); } session->queued_cmdsn++; @@ -1943,7 +1953,7 @@ EXPORT_SYMBOL_GPL(iscsi_suspend_queue); /** * iscsi_suspend_tx - suspend iscsi_data_xmit - * @conn: iscsi conn tp stop processing IO on. + * @conn: iscsi conn to stop processing IO on. * * This function sets the suspend bit to prevent iscsi_data_xmit * from sending new IO, and if work is queued on the xmit thread @@ -1956,15 +1966,30 @@ void iscsi_suspend_tx(struct iscsi_conn *conn) set_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags); if (ihost->workq) - flush_workqueue(ihost->workq); + flush_work(&conn->xmitwork); } EXPORT_SYMBOL_GPL(iscsi_suspend_tx); static void iscsi_start_tx(struct iscsi_conn *conn) { clear_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags); - iscsi_conn_queue_work(conn); + iscsi_conn_queue_xmit(conn); +} + +/** + * iscsi_suspend_rx - Prevent recvwork from running again. + * @conn: iscsi conn to stop. + */ +void iscsi_suspend_rx(struct iscsi_conn *conn) +{ + struct Scsi_Host *shost = conn->session->host; + struct iscsi_host *ihost = shost_priv(shost); + + set_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags); + if (ihost->workq) + flush_work(&conn->recvwork); } +EXPORT_SYMBOL_GPL(iscsi_suspend_rx); /* * We want to make sure a ping is in flight. It has timed out. |