1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index d90cf5d08142..835cf646bb07 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -887,6 +887,29 @@ static void ide_plug_device(ide_drive_t *drive)
         spin_unlock_irqrestore(q->queue_lock, flags);
 }
 
+static int drive_is_ready(ide_drive_t *drive)
+{
+        ide_hwif_t *hwif = drive->hwif;
+        u8 stat = 0;
+
+        if (drive->waiting_for_dma)
+                return hwif->dma_ops->dma_test_irq(drive);
+
+        if (hwif->io_ports.ctl_addr &&
+            (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0)
+                stat = hwif->tp_ops->read_altstatus(hwif);
+        else
+                /* Note: this may clear a pending IRQ!! */
+                stat = hwif->tp_ops->read_status(hwif);
+
+        if (stat & ATA_BUSY)
+                /* drive busy: definitely not interrupting */
+                return 0;
+
+        /* drive ready: *might* be interrupting */
+        return 1;
+}
+
 /**
  *      ide_timer_expiry        -       handle lack of an IDE interrupt
  *      @data: timer callback magic (hwif)