Bounce buffers. From John Dyson with help from me.

[unix-history] / sys / scsi / st.c

diff --git a/sys/scsi/st.c b/sys/scsi/st.c
index 871614d..b72cb76 100644 (file)
--- a/sys/scsi/st.c
+++ b/sys/scsi/st.c
@@ -21,13 +21,13 @@
  * 16 Feb 93    Julian Elischer         ADDED for SCSI system
  * 1.15 is the last version to support MACH and OSF/1
  */
  * 16 Feb 93    Julian Elischer         ADDED for SCSI system
  * 1.15 is the last version to support MACH and OSF/1
  */

-/* $Revision: 1.14 $ */
+/* $Revision: 1.15 $ */

 
 /*
  * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
  * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993
  *
 
 /*
  * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
  * major changes by Julian Elischer (julian@jules.dialix.oz.au) May 1993
  *

- *      $Id: st.c,v 1.14 1993/12/19 00:54:59 wollman Exp $
+ *      $Id: st.c,v 1.15 1994/01/29 10:30:41 rgrimes Exp $

  */
 
 /*
  */
 
 /*


@@ -911,6 +911,14 @@ ststrategy(bp)
        stminphys(bp);
        opri = splbio();
 
        stminphys(bp);
        opri = splbio();
 

+       /*      
+        * Use a bounce buffer if necessary
+        */      
+#ifndef NOBOUNCE
+       if (st->sc_link->flags & SDEV_BOUNCE)
+               vm_bounce_alloc(bp);
+#endif
+

        /*
         * Place it in the queue of activities for this tape
         * at the end (a bit silly because we only have on user..
        /*
         * Place it in the queue of activities for this tape
         * at the end (a bit silly because we only have on user..