2 files changed, 18 insertions, 15 deletions

diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index b401c82036be..ebf31b16dc49 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -223,13 +223,13 @@ extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *,
                                                   struct scsi_device *);
 
 /**
- * shost_for_each_device  -  iterate over all devices of a host
- * @sdev:       iterator
- * @host:       host whiches devices we want to iterate over
+ * shost_for_each_device - iterate over all devices of a host
+ * @sdev: the &struct scsi_device to use as a cursor
+ * @shost: the &struct scsi_host to iterate over
  *
- * This traverses over each devices of @shost.  The devices have
- * a reference that must be released by scsi_host_put when breaking
- * out of the loop.
+ * Iterator that returns each device attached to @shost.  This loop
+ * takes a reference on each device and releases it at the end.  If
+ * you break out of the loop, you must call scsi_device_put(sdev).
  */
 #define shost_for_each_device(sdev, shost) \
         for ((sdev) = __scsi_iterate_devices((shost), NULL); \
@@ -237,17 +237,17 @@ extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *,
              (sdev) = __scsi_iterate_devices((shost), (sdev)))
 
 /**
- * __shost_for_each_device  -  iterate over all devices of a host (UNLOCKED)
- * @sdev:       iterator
- * @host:       host whiches devices we want to iterate over
+ * __shost_for_each_device - iterate over all devices of a host (UNLOCKED)
+ * @sdev: the &struct scsi_device to use as a cursor
+ * @shost: the &struct scsi_host to iterate over
  *
- * This traverses over each devices of @shost.  It does _not_ take a
- * reference on the scsi_device, thus it the whole loop must be protected
- * by shost->host_lock.
+ * Iterator that returns each device attached to @shost.  It does _not_
+ * take a reference on the scsi_device, so the whole loop must be
+ * protected by shost->host_lock.
  *
- * Note:  The only reason why drivers would want to use this is because
- * they're need to access the device list in irq context.  Otherwise you
- * really want to use shost_for_each_device instead.
+ * Note: The only reason to use this is because you need to access the
+ * device list in interrupt context.  Otherwise you really want to use
+ * shost_for_each_device instead.
  */
 #define __shost_for_each_device(sdev, shost) \
         list_for_each_entry((sdev), &((shost)->__devices), siblings)
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 39c6f8cc20c3..ba5b3eb6b43f 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -552,6 +552,9 @@ struct Scsi_Host {
         /* task mgmt function in progress */
         unsigned tmf_in_progress:1;
 
+        /* Asynchronous scan in progress */
+        unsigned async_scan:1;
+
         /*
          * Optional work queue to be utilized by the transport
          */