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Commit 4cde32fc authored by Jeff Garzik's avatar Jeff Garzik
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[libata] ahci: SB600 workaround is suspect... play it safe for now 



At least one report claims that a878539e
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: default avatarJeff Garzik <jgarzik@redhat.com>
parent c07a9c49

drivers/ata/ahci.c

+5 −1
Original line number Diff line number Diff line
@@ -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)