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[libata] ahci: SB600 workaround is suspect... play it safe for now 

At least one report claims that a878539ef9
failed to solve lockups, whereas the old limit-to-32-bit trick worked.

Restore the 32-bit limit, but also leave the 255-sector limit in place,
because we know that's needed as well.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Jeff Garzik 2008-03-24 22:40:40 -04:00
parent c07a9c4995
commit 4cde32fc4b
1 changed files with 5 additions and 1 deletions
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6
drivers/ata/ahci.c
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@ -433,6 +433,7 @@ static const struct ata_port_info ahci_port_info[] = {
/* board_ahci_sb600 */
{
AHCI_HFLAGS (AHCI_HFLAG_IGN_SERR_INTERNAL |
AHCI_HFLAG_32BIT_ONLY |
AHCI_HFLAG_SECT255 | AHCI_HFLAG_NO_PMP),
.flags = AHCI_FLAG_COMMON,
.link_flags = AHCI_LFLAG_COMMON,
@ -1217,8 +1218,11 @@ static void ahci_dev_config(struct ata_device *dev)
{
struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
if (hpriv->flags & AHCI_HFLAG_SECT255)
if (hpriv->flags & AHCI_HFLAG_SECT255) {
dev->max_sectors = 255;
ata_dev_printk(dev, KERN_INFO,
"SB600 AHCI: limiting to 255 sectors per cmd\n");
}
}
static unsigned int ahci_dev_classify(struct ata_port *ap)