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Commit 362ebd83 authored by Albert Lee's avatar Albert Lee Committed by Bartlomiej Zolnierkiewicz
Browse files

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: default avatarAlbert Lee <albertcc@tw.ibm.com>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent b43c5f3d

drivers/ide/pci/pdc202xx_new.c

+2 −1
Original line number Diff line number Diff line
@@ -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;