[SCSI] Update documentation

The documentation has gone out-of-sync, so update it to
the current status.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/Documentation/scsi/scsi_mid_low_api.txt b/Documentation/scsi/scsi_mid_low_api.txt
index 2b06aba4fa0f..d6a9bdeee7f2 100644
--- a/Documentation/scsi/scsi_mid_low_api.txt
+++ b/Documentation/scsi/scsi_mid_low_api.txt
@@ -882,8 +882,11 @@ Details:
  *
  *      Calling context: kernel thread
  *
- *      Notes: Invoked from scsi_eh thread. No other commands will be
- *      queued on current host during eh.
+ *      Notes: If 'no_async_abort' is defined this callback
+ *      will be invoked from scsi_eh thread. No other commands
+ *      will then be queued on current host during eh.
+ *      Otherwise it will be called whenever scsi_times_out()
+ *      is called due to a command timeout.
  *
  *      Optionally defined in: LLD
  **/
@@ -1257,6 +1260,8 @@ of interest:
                    address space
     use_clustering - 1=>SCSI commands in mid level's queue can be merged,
                      0=>disallow SCSI command merging
+    no_async_abort - 1=>Asynchronous aborts are not supported
+                     0=>Timed-out commands will be aborted asynchronously
     hostt        - pointer to driver's struct scsi_host_template from which
                    this struct Scsi_Host instance was spawned
     hostt->proc_name  - name of LLD. This is the driver name that sysfs uses