[PATCH 06/12] lpfc: Convert to host_lock less w/ interrupts disabled externally

["Nicholas A. Bellinger" <nab@linux-iscsi.org>]

From: Nicholas Bellinger <nab@linux-iscsi.org>

This patch converts lpfc to run in host_lock less mode with the new
IRQ_DISABLE_SCSI_QCMD() that disables interrupts while calling ->queuecommand()
dispatch.  It also drops the legacy host_lock unlock optimization around
lpfc_sli_handle_fast_ring_event().

Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
 drivers/scsi/lpfc/lpfc_scsi.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 581837b..62a62e9 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -2886,7 +2886,7 @@ void lpfc_poll_timeout(unsigned long ptr)
 }
 
 /**
- * lpfc_queuecommand - scsi_host_template queuecommand entry point
+ * lpfc_queuecommand_irq_disable - scsi_host_template queuecommand entry point
  * @cmnd: Pointer to scsi_cmnd data structure.
  * @done: Pointer to done routine.
  *
@@ -2899,7 +2899,8 @@ void lpfc_poll_timeout(unsigned long ptr)
  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
  **/
 static int
-lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
+lpfc_queuecommand_irq_disable(struct scsi_cmnd *cmnd,
+			void (*done) (struct scsi_cmnd *))
 {
 	struct Scsi_Host  *shost = cmnd->device->host;
 	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
@@ -3038,11 +3039,9 @@ lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 		goto out_host_busy_free_buf;
 	}
 	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
-		spin_unlock(shost->host_lock);
 		lpfc_sli_handle_fast_ring_event(phba,
 			&phba->sli.ring[LPFC_FCP_RING], HA_R0RE_REQ);
 
-		spin_lock(shost->host_lock);
 		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
 			lpfc_poll_rearm_timer(phba);
 	}
@@ -3060,7 +3059,7 @@ lpfc_queuecommand_lck(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
 	return 0;
 }
 
-static DEF_SCSI_QCMD(lpfc_queuecommand)
+static IRQ_DISABLE_SCSI_QCMD(lpfc_queuecommand)
 
 /**
  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
-- 
1.7.3.4