[PATCH] s390: channel tape fixes

Tape driver fixes:
 - Added deferred condition handling to tape driver core.
 - Added ability to handle busy conditions.
 - Code cleanup.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/s390/char/tape.h b/drivers/s390/char/tape.h
index d04e6c2c3cc1..01d865d93791 100644
--- a/drivers/s390/char/tape.h
+++ b/drivers/s390/char/tape.h
@@ -3,10 +3,11 @@
  *    tape device driver for 3480/3490E/3590 tapes.
  *
  *  S390 and zSeries version
- *    Copyright (C) 2001,2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Copyright (C) 2001,2005 IBM Deutschland Entwicklung GmbH, IBM Corporation
  *    Author(s): Carsten Otte <cotte@de.ibm.com>
  *               Tuan Ngo-Anh <ngoanh@de.ibm.com>
  *               Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *               Stefan Bader <shbader@de.ibm.com>
  */
 
 #ifndef _TAPE_H
@@ -111,6 +112,7 @@ enum tape_request_status {
         TAPE_REQUEST_QUEUED,    /* request is queued to be processed */
         TAPE_REQUEST_IN_IO,     /* request is currently in IO */
         TAPE_REQUEST_DONE,      /* request is completed. */
+        TAPE_REQUEST_CANCEL,    /* request should be canceled. */
 };
 
 /* Tape CCW request */
@@ -237,6 +239,9 @@ struct tape_device {
         /* Block dev frontend data */
         struct tape_blk_data            blk_data;
 #endif
+
+        /* Function to start or stop the next request later. */
+        struct work_struct              tape_dnr;
 };
 
 /* Externals from tape_core.c */