[PATCH] move ->eh_strategy_handler to the transport class

Overriding the whole EH code is a per-transport, not per-host thing.
Move ->eh_strategy_handler to the transport class, same as
->eh_timed_out.

Downside is that scsi_host_alloc can't check for the total lack of EH
anymore, but the transition period from old EH where we needed it is
long gone already.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

3 files changed, 8 insertions, 27 deletions

diff --git a/Documentation/DocBook/libata.tmpl b/Documentation/DocBook/libata.tmpl
index 5bcbb6ee3bc0..f869b03929db 100644
--- a/Documentation/DocBook/libata.tmpl
+++ b/Documentation/DocBook/libata.tmpl
@@ -705,7 +705,7 @@ and other resources, etc.
 
         <sect1><title>ata_scsi_error()</title>
         <para>
-        ata_scsi_error() is the current hostt->eh_strategy_handler()
+        ata_scsi_error() is the current transportt->eh_strategy_handler()
         for libata.  As discussed above, this will be entered in two
         cases - timeout and ATAPI error completion.  This function
         calls low level libata driver's eng_timeout() callback, the
diff --git a/Documentation/scsi/scsi_eh.txt b/Documentation/scsi/scsi_eh.txt
index 331afd791cbb..ce767b90bb0d 100644
--- a/Documentation/scsi/scsi_eh.txt
+++ b/Documentation/scsi/scsi_eh.txt
@@ -19,9 +19,9 @@ TABLE OF CONTENTS
         [2-1-1] Overview
         [2-1-2] Flow of scmds through EH
         [2-1-3] Flow of control
-    [2-2] EH through hostt->eh_strategy_handler()
-        [2-2-1] Pre hostt->eh_strategy_handler() SCSI midlayer conditions
-        [2-2-2] Post hostt->eh_strategy_handler() SCSI midlayer conditions
+    [2-2] EH through transportt->eh_strategy_handler()
+        [2-2-1] Pre transportt->eh_strategy_handler() SCSI midlayer conditions
+        [2-2-2] Post transportt->eh_strategy_handler() SCSI midlayer conditions
         [2-2-3] Things to consider
 
 
@@ -413,9 +413,9 @@ scmd->allowed.
             layer of failure of the scmds.
 
 
-[2-2] EH through hostt->eh_strategy_handler()
+[2-2] EH through transportt->eh_strategy_handler()
 
- hostt->eh_strategy_handler() is invoked in the place of
+ transportt->eh_strategy_handler() is invoked in the place of
 scsi_unjam_host() and it is responsible for whole recovery process.
 On completion, the handler should have made lower layers forget about
 all failed scmds and either ready for new commands or offline.  Also,
@@ -424,7 +424,7 @@ SCSI midlayer.  IOW, of the steps described in [2-1-2], all steps
 except for #1 must be implemented by eh_strategy_handler().
 
 
-[2-2-1] Pre hostt->eh_strategy_handler() SCSI midlayer conditions
+[2-2-1] Pre transportt->eh_strategy_handler() SCSI midlayer conditions
 
  The following conditions are true on entry to the handler.
 
@@ -437,7 +437,7 @@ except for #1 must be implemented by eh_strategy_handler().
  - shost->host_failed == shost->host_busy
 
 
-[2-2-2] Post hostt->eh_strategy_handler() SCSI midlayer conditions
+[2-2-2] Post transportt->eh_strategy_handler() SCSI midlayer conditions
 
  The following conditions must be true on exit from the handler.
 
diff --git a/Documentation/scsi/scsi_mid_low_api.txt b/Documentation/scsi/scsi_mid_low_api.txt
index 8bbae3e1abdf..75a535a975c3 100644
--- a/Documentation/scsi/scsi_mid_low_api.txt
+++ b/Documentation/scsi/scsi_mid_low_api.txt
@@ -804,7 +804,6 @@ Summary:
    eh_bus_reset_handler - issue SCSI bus reset
    eh_device_reset_handler - issue SCSI device reset
    eh_host_reset_handler - reset host (host bus adapter)
-   eh_strategy_handler - driver supplied alternate to scsi_unjam_host()
    info - supply information about given host
    ioctl - driver can respond to ioctls
    proc_info - supports /proc/scsi/{driver_name}/{host_no}
@@ -970,24 +969,6 @@ Details:
 
 
 /**
- *      eh_strategy_handler - driver supplied alternate to scsi_unjam_host()
- *      @shp: host on which error has occurred
- *
- *      Returns TRUE if host unjammed, else FALSE.
- *
- *      Locks: none
- *
- *      Calling context: kernel thread
- *
- *      Notes: Invoked from scsi_eh thread. LLD supplied alternate to 
- *      scsi_unjam_host() found in scsi_error.c
- *
- *      Optionally defined in: LLD
- **/
-     int eh_strategy_handler(struct Scsi_Host * shp)
-
-
-/**
  *      info - supply information about given host: driver name plus data
  *             to distinguish given host
  *      @shp: host to supply information about