diff options
| -rw-r--r-- | drivers/ata/libata-core.c | 4 | ||||
| -rw-r--r-- | include/linux/libata.h | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 82af7011f2dd..91b478f20557 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4024,6 +4024,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = { /* Weird ATAPI devices */ { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 }, + { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA }, /* Devices we expect to fail diagnostics */ @@ -4444,7 +4445,8 @@ int atapi_check_dma(struct ata_queued_cmd *qc) /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a * few ATAPI devices choke on such DMA requests. */ - if (unlikely(qc->nbytes & 15)) + if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) && + unlikely(qc->nbytes & 15)) return 1; if (ap->ops->check_atapi_dma) diff --git a/include/linux/libata.h b/include/linux/libata.h index f5441edee55f..c7665a4134c5 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -373,6 +373,8 @@ enum { ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */ ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */ ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */ + ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands + not multiple of 16 bytes */ /* DMA mask for user DMA control: User visible values; DO NOT renumber */ |