[PATCH] Suspend support for libata

This patch adds suspend patch to libata, and ata_piix in particular. For
most low level drivers, they should just need to add the 4 hooks to
work. As I can only test ata_piix, I didn't enable it for more
though.

Suspend support is the single most important feature on a notebook, and
most new notebooks have sata drives. It's quite embarrassing that we
_still_ do not support this. Right now, it's perfectly possible to
suspend the drive in mid-transfer.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 6cbb1982ed0..6297885a35e 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -296,6 +296,12 @@ struct scsi_host_template {
         int (*proc_info)(struct Scsi_Host *, char *, char **, off_t, int, int);
 
         /*
+         * suspend support
+         */
+        int (*resume)(struct scsi_device *);
+        int (*suspend)(struct scsi_device *);
+
+        /*
          * Name of proc directory
          */
         char *proc_name;