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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2007-10-15 19:18:27 +0100
committerJeff Garzik <jeff@garzik.org>2007-10-25 02:10:52 -0400
commit3acaf94bb0a69cca75a524a4ba8c30a9eae97dc8 (patch)
treebc4a04afbd65cb3fea58ac8fe97abc95b8cf1b6a /drivers/ata
parentedc93052844c2032b2ec5910ace516da9078714d (diff)
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: Alan Cox <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-core.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 0ec717b748d..9d10e2feb8b 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -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 },