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Commit 64084729 authored by Tang Yuantian's avatar Tang Yuantian Committed by Tejun Heo
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ahci: qoriq: Disable NCQ on ls2080a SoC 



NCQ feature can't be used due to the erratum A-008473.
This patch disables NCQ as a workaround.

Signed-off-by: default avatarTang Yuantian <Yuantian.Tang@freescale.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent d19f9aaf

drivers/ata/ahci_qoriq.c

+7 −1
Original line number Diff line number Diff line
@@ -131,7 +131,7 @@ static struct ata_port_operations ahci_qoriq_ops = { 
	.hardreset	= ahci_qoriq_hardreset,

};



static const struct ata_port_info ahci_qoriq_port_info = {

static struct ata_port_info ahci_qoriq_port_info = {

	.flags		= AHCI_FLAG_COMMON | ATA_FLAG_NCQ,

	.pio_mask	= ATA_PIO4,

	.udma_mask	= ATA_UDMA6,
@@ -208,6 +208,12 @@ static int ahci_qoriq_probe(struct platform_device *pdev) 
	if (rc)

		goto disable_resources;



	/* Workaround for ls2080a */

	if (qoriq_priv->type == AHCI_LS2080A) {

		hpriv->flags |= AHCI_HFLAG_NO_NCQ;

		ahci_qoriq_port_info.flags &= ~ATA_FLAG_NCQ;

	}



	rc = ahci_platform_init_host(pdev, hpriv, &ahci_qoriq_port_info,

				     &ahci_qoriq_sht);

	if (rc)