ide: add ide_io_buffers() helper

* Make ->io_buffers method return number of bytes transferred.

* Use ide_end_request() instead of idefloppy_end_request()
  in ide_floppy_io_buffers() and then move the call out to
  ide_pc_intr().

* Add ide_io_buffers() helper and convert ide-{floppy,scsi}.c
  to use it instead of ide*_io_buffers().

There should be no functional changes caused by this patch.

Acked-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/ide.h b/include/linux/ide.h
index e63ff63d1f0b..03dc2157a2b5 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1099,6 +1099,8 @@ void ide_tf_read(ide_drive_t *, ide_task_t *);
 void ide_input_data(ide_drive_t *, struct request *, void *, unsigned int);
 void ide_output_data(ide_drive_t *, struct request *, void *, unsigned int);
 
+int ide_io_buffers(ide_drive_t *, struct ide_atapi_pc *, unsigned int, int);
+
 extern void SELECT_DRIVE(ide_drive_t *);
 void SELECT_MASK(ide_drive_t *, int);
 
@@ -1115,7 +1117,7 @@ ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
         ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
         void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),
         void (*retry_pc)(ide_drive_t *), void (*dsc_handle)(ide_drive_t *),
-        void (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned int,
+        int (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned int,
                            int));
 ide_startstop_t ide_transfer_pc(ide_drive_t *, struct ide_atapi_pc *,
                                 ide_handler_t *, unsigned int, ide_expiry_t *);