ide: clear bmdma status in ide_intr() for ICHx controllers (revised #4)

patch 1/2 (revised):
- Fix drive->waiting_for_dma to work with CDB-intr devices.
- Do the dma status clearing in ide_intr() and add a new
  hwif->ide_dma_clear_irq for Intel ICHx controllers.

Revised per Alan, Sergei and Bart's advice.

Patch against 2.6.20-rc6. Tested ok on my ICH4 and pdc20275 adapters.
Please review/apply, thanks.

Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: "Adam W. Hawks" <awhawks@us.ibm.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index c750f6ce770a..65eb095469b5 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -509,6 +509,7 @@ static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
         hwif->ide_dma_on                = tmp_hwif->ide_dma_on;
         hwif->ide_dma_off_quietly       = tmp_hwif->ide_dma_off_quietly;
         hwif->ide_dma_test_irq          = tmp_hwif->ide_dma_test_irq;
+        hwif->ide_dma_clear_irq         = tmp_hwif->ide_dma_clear_irq;
         hwif->ide_dma_host_on           = tmp_hwif->ide_dma_host_on;
         hwif->ide_dma_host_off          = tmp_hwif->ide_dma_host_off;
         hwif->ide_dma_lostirq           = tmp_hwif->ide_dma_lostirq;