pdc202xx_new: Enable ATAPI DMA

[ bart: the ressurection of 2 years old patch which slipped thru the cracks
  (thanks to Sergei Shtylyov for finding it) ]

These is the patch to turn on pdc202xx_new for ATAPI DMA.  When testing, it
works fine without the (request_bufflen % 256) workaround as needed in libata.
ide-scsi filters out (pc->request_transfer % 1024) and use PIO, so the pdc202xx
ATAPI DMA problem is avoid.  Both ide-cd and ide-scsi won't hit the ATAPI DMA
problem on pdc202xx_new.

Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/pci/pdc202xx_new.c b/drivers/ide/pci/pdc202xx_new.c
index 6ceb25bc5a7bb1109e22ff804a997dde62d66cc9..ace98929cc3d86a3897edb6c6e08b894e6de72a3 100644 (file)
--- a/drivers/ide/pci/pdc202xx_new.c
+++ b/drivers/ide/pci/pdc202xx_new.c
@@ -255,7 +255,7 @@ static int config_chipset_for_dma(ide_drive_t *drive)
                printk(KERN_WARNING "%s reduced to Ultra33 mode.\n", drive->name);
        }
 
-       if (drive->media != ide_disk)
+       if (drive->media != ide_disk && drive->media != ide_cdrom)
                return 0;
 
        if (id->capability & 4) {
@@ -545,6 +545,7 @@ static void __devinit init_hwif_pdc202new(ide_hwif_t *hwif)
 
        hwif->drives[0].autotune = hwif->drives[1].autotune = 1;
 
+       hwif->atapi_dma  = 1;
        hwif->ultra_mask = 0x7f;
        hwif->mwdma_mask = 0x07;