ide-{floppy,scsi}: read Status Register before stopping DMA engine

Read Status Register before stopping DMA engine to match ide-tape
device driver - it should be safe and shouldn't affect anything.

This is a preparation for adding generic ide_pc_intr() helper.

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

drivers/ide/ide-floppy.c

@@ -399,6 +399,9 @@ static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 
 	debug_log("Enter %s - interrupt handler\n", __func__);
 
+	/* Clear the interrupt */
+	stat = ide_read_status(drive);
+
 	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 		dma_error = hwif->dma_ops->dma_end(drive);
 		if (dma_error) {
@@ -412,9 +415,6 @@ static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 		debug_log("%s: DMA finished\n", drive->name);
 	}
 
-	/* Clear the interrupt */
-	stat = ide_read_status(drive);
-
 	/* No more interrupts */
 	if ((stat & DRQ_STAT) == 0) {
 		debug_log("Packet command completed, %d bytes transferred\n",

drivers/scsi/ide-scsi.c

@@ -370,6 +370,10 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 		pc->callback(drive);
 		return ide_stopped;
 	}
+
+	/* Clear the interrupt */
+	stat = ide_read_status(drive);
+
 	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 		if (hwif->dma_ops->dma_end(drive))
 			pc->flags |= PC_FLAG_DMA_ERROR;
@@ -378,9 +382,6 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 		debug_log("%s: DMA finished\n", drive->name);
 	}
 
-	/* Clear the interrupt */
-	stat = ide_read_status(drive);
-
 	if ((stat & DRQ_STAT) == 0) {
 		/* No more interrupts */
 		debug_log("Packet command completed, %d bytes transferred\n",