ide: add ide_atapi_{discard_data,write_zeros} inline helpers

Add ide_atapi_{discard_data,write_zeros} inline helpers to <linux/ide.h>
and use them instead of home-brewn helpers in ide-{floppy,tape,scsi}.

There should be no functional changes caused by this patch.

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

1 files changed, 22 insertions, 0 deletions

diff --git a/include/linux/ide.h b/include/linux/ide.h
index f4c7db572a16..2eb99cab4a3d 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1297,4 +1297,26 @@ static inline u8 ide_read_error(ide_drive_t *drive)
         return hwif->INB(hwif->io_ports[IDE_ERROR_OFFSET]);
 }
 
+/*
+ * Too bad. The drive wants to send us data which we are not ready to accept.
+ * Just throw it away.
+ */
+static inline void ide_atapi_discard_data(ide_drive_t *drive, unsigned bcount)
+{
+        ide_hwif_t *hwif = drive->hwif;
+
+        /* FIXME: use ->atapi_input_bytes */
+        while (bcount--)
+                (void)hwif->INB(hwif->io_ports[IDE_DATA_OFFSET]);
+}
+
+static inline void ide_atapi_write_zeros(ide_drive_t *drive, unsigned bcount)
+{
+        ide_hwif_t *hwif = drive->hwif;
+
+        /* FIXME: use ->atapi_output_bytes */
+        while (bcount--)
+                hwif->OUTB(0, hwif->io_ports[IDE_DATA_OFFSET]);
+}
+
 #endif /* _IDE_H */