[SCSI] Block I/O while SG reset operation in progress - lpfc portion

This removes the duplicate functionality which had been added to
the lpfc driver.

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/lpfc/lpfc.h

@@ -174,7 +174,6 @@ struct lpfc_hba {
 	dma_addr_t slim2p_mapping;
 	uint16_t pci_cfg_value;
 
-	struct semaphore hba_can_block;
 	int32_t hba_state;
 
 #define LPFC_STATE_UNKNOWN        0    /* HBA state is unknown */

drivers/scsi/lpfc/lpfc_init.c

@@ -1451,7 +1451,6 @@ lpfc_pci_probe_one(struct pci_dev *pdev, const struct pci_device_id *pid)
 		goto out_put_host;
 
 	host->unique_id = phba->brd_no;
-	init_MUTEX(&phba->hba_can_block);
 	INIT_LIST_HEAD(&phba->ctrspbuflist);
 	INIT_LIST_HEAD(&phba->rnidrspbuflist);
 	INIT_LIST_HEAD(&phba->freebufList);

drivers/scsi/lpfc/lpfc_scsi.c

@@ -41,20 +41,6 @@
 #define LPFC_ABORT_WAIT  2
 
 
-static inline void
-lpfc_block_requests(struct lpfc_hba * phba)
-{
-	down(&phba->hba_can_block);
-	scsi_block_requests(phba->host);
-}
-
-static inline void
-lpfc_unblock_requests(struct lpfc_hba * phba)
-{
-	scsi_unblock_requests(phba->host);
-	up(&phba->hba_can_block);
-}
-
 /*
  * This routine allocates a scsi buffer, which contains all the necessary
  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
@@ -859,7 +845,6 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd)
 	unsigned int loop_count = 0;
 	int ret = SUCCESS;
 
-	lpfc_block_requests(phba);
 	spin_lock_irq(shost->host_lock);
 
 	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
@@ -945,7 +930,6 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd)
 			cmnd->device->lun, cmnd->serial_number);
 
 	spin_unlock_irq(shost->host_lock);
-	lpfc_unblock_requests(phba);
 
 	return ret;
 }
@@ -963,7 +947,6 @@ lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
 	int ret = FAILED;
 	int cnt, loopcnt;
 
-	lpfc_block_requests(phba);
 	spin_lock_irq(shost->host_lock);
 	/*
 	 * If target is not in a MAPPED state, delay the reset until
@@ -1065,7 +1048,6 @@ out_free_scsi_buf:
 
 out:
 	spin_unlock_irq(shost->host_lock);
-	lpfc_unblock_requests(phba);
 	return ret;
 }
 
@@ -1080,7 +1062,6 @@ lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
 	int cnt, loopcnt;
 	struct lpfc_scsi_buf * lpfc_cmd;
 
-	lpfc_block_requests(phba);
 	spin_lock_irq(shost->host_lock);
 
 	lpfc_cmd = lpfc_get_scsi_buf(phba);
@@ -1163,7 +1144,6 @@ lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
 			phba->brd_no, ret);
 out:
 	spin_unlock_irq(shost->host_lock);
-	lpfc_unblock_requests(phba);
 	return ret;
 }