ide: remove ide_execute_pkt_cmd() (v2)

* Pass command structure to ide_execute_command() and skip
  __ide_set_handler() for ATAPI protocols on non-DRQ devices.

* Convert ide_issue_pc() to always use ide_execute_command()
  and remove no longer needed ide_execute_pkt_cmd().

v2:
* Fix for non-DRQ devices (based on report from Borislav).

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>
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index f5cf04c..329fd6f 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -97,8 +97,7 @@
 	case ATA_PROT_NODATA:
 		if (handler == NULL)
 			handler = task_no_data_intr;
-		ide_execute_command(drive, tf->command, handler,
-				    WAIT_WORSTCASE);
+		ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
 		return ide_started;
 	case ATA_PROT_DMA:
 		if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
@@ -106,8 +105,7 @@
 		    dma_ops->dma_setup(drive, cmd))
 			return ide_stopped;
 		hwif->expiry = dma_ops->dma_timer_expiry;
-		ide_execute_command(drive, tf->command, ide_dma_intr,
-				    2 * WAIT_CMD);
+		ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 		dma_ops->dma_start(drive);
 	default:
 		return ide_started;