[SCSI] allow sleeping in ->eh_host_reset_handler()

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/53c700.c b/drivers/scsi/53c700.c
index 47cf9bd..d151af9 100644
--- a/drivers/scsi/53c700.c
+++ b/drivers/scsi/53c700.c
@@ -1991,8 +1991,13 @@
 	       SCp->device->host->host_no, SCp->device->id, SCp->device->lun);
 	scsi_print_command(SCp);
 
+	spin_lock_irq(SCp->device->host->host_lock);
+
 	NCR_700_internal_bus_reset(SCp->device->host);
 	NCR_700_chip_reset(SCp->device->host);
+
+	spin_unlock_irq(SCp->device->host->host_lock);
+
 	return SUCCESS;
 }