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Disable ATA DMA for ATAPI devices for now. Apparently, certain revisions

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of this controller, in combination with certain ATAPI devices and phases
of the moon, will cause DMA operations for ATAPI to fail.
This commit is contained in:
Nathan Whitehorn 2009-03-25 03:42:49 +00:00
parent 0cd9c215fa
commit 09b29530db
1 changed files with 4 additions and 0 deletions
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4
sys/powerpc/powermac/ata_macio.c
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@ -259,6 +259,10 @@ ata_macio_setmode(device_t parent, device_t dev)
mode = ata_limit_mode(dev, mode, sc->max_mode);
/* XXX Some controllers don't work correctly with ATAPI DMA */
if (atadev->param.config & ATA_PROTO_ATAPI)
mode = ata_limit_mode(dev, mode, ATA_PIO_MAX);
if (ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_SETXFER, 0, mode))
return;