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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-03-24 23:22:43 +0100
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-03-24 23:22:43 +0100
commitb6a45a0b1e9a358b81201659cf87b023e3ec73e0 (patch)
tree07a3d4f02f33ec872862f278b4feffc8e5273e90 /drivers/ide/ide-io.c
parent75a0cff4e8ed47584dd15fbde2172ebc4c051bb2 (diff)
ide: move drive_is_ready() to ide-io.c
Move drive_is_ready() to ide-io.c, then make it static. Also make some minor CodingStyle fixups while at it. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-io.c')
-rw-r--r--drivers/ide/ide-io.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index d90cf5d0814..835cf646bb0 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)