ide: add ide_pktcmd_tf_load() helper

Add ide_pktcmd_tf_load() helper and convert ATAPI device drivers to use it.

There should be no functionality changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index d36df77c7519..1ed7a8627cca 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -1734,3 +1734,19 @@ int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t actio
 }
 
 EXPORT_SYMBOL(ide_do_drive_cmd);
+
+void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount, u8 dma)
+{
+        ide_task_t task;
+
+        memset(&task, 0, sizeof(task));
+        task.tf_flags = IDE_TFLAG_OUT_LBAH | IDE_TFLAG_OUT_LBAM |
+                        IDE_TFLAG_OUT_FEATURE | tf_flags;
+        task.tf.feature = dma;          /* Use PIO/DMA */
+        task.tf.lbam    = bcount & 0xff;
+        task.tf.lbah    = (bcount >> 8) & 0xff;
+
+        ide_tf_load(drive, &task);
+}
+
+EXPORT_SYMBOL_GPL(ide_pktcmd_tf_load);