Commit 3acaf94b authored by Alan Cox's avatar Alan Cox Committed by Jeff Garzik

libata-core: Be a bit more relaxed about early DMA zero devices

I guess Windows didn't care about the command so neither did they
Signed-off-by: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent edc93052
......@@ -2882,6 +2882,13 @@ static int ata_dev_set_mode(struct ata_device *dev)
dev->pio_mode <= XFER_PIO_2)
err_mask &= ~AC_ERR_DEV;
/* Early MWDMA devices do DMA but don't allow DMA mode setting.
Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
dev->dma_mode == XFER_MW_DMA_0 &&
(dev->id[63] >> 8) & 1)
err_mask &= ~AC_ERR_DEV;
if (err_mask) {
ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
"(err_mask=0x%x)\n", err_mask);
......@@ -3943,9 +3950,6 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
{ "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
{ "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
{ "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
{ "IOMEGA ZIP 250 ATAPI", NULL, ATA_HORKAGE_NODMA }, /* temporary fix */
{ "IOMEGA ZIP 250 ATAPI Floppy",
NULL, ATA_HORKAGE_NODMA },
/* Odd clown on sil3726/4726 PMPs */
{ "Config Disk", NULL, ATA_HORKAGE_NODMA |
ATA_HORKAGE_SKIP_PM },
......
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