libata: implement ATA_HORKAGE_ATAPI_MOD16_DMA and apply it

[linux-2.6-omap-h63xx.git] / drivers / ata / libata-core.c

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 82af7011f2ddd137e2a601ae95c704a4219ada9e..91b478f205572ec6570e17bb41bda4b635593311 100644 (file)
--- 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)