Commit f3745a3f authored Aug 22, 2006 by Tejun Heo Committed by Jeff Garzik Aug 24, 2006

[PATCH] ata_piix: ignore PCS on ICH5



There have been a number of reports regarding some ICH5s failing to
detect devices since the PCS handling update.  Analysis shows that
these problems are caused by bogus PCS values from those controllers.

Before the PCS update, the driver didn't honor PCS regs exactly and
probed them in many cases PCS reports no device.  Now that PCS is
honored exactly, these hardware problems are visible.

This patch makes ICH5 ignore PCS.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

parent f1a58eca

drivers/scsi/ata_piix.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -390,7 +390,8 @@ static struct ata_port_info piix_port_info[] = {
		/* ich5_sata */
		{
		.sht = &piix_sht,
		.host_flags = ATA_FLAG_SATA \| PIIX_FLAG_CHECKINTR,
		.host_flags = ATA_FLAG_SATA \| PIIX_FLAG_CHECKINTR \|
		PIIX_FLAG_IGNORE_PCS,
		.pio_mask = 0x1f, /* pio0-4 */
		.mwdma_mask = 0x07, /* mwdma0-2 */
		.udma_mask = 0x7f, /* udma0-6 */

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