[PATCH 2/3] ahci: qoriq: Disable NCQ on ls2080a SoC

[Tang Yuantian <Yuantian.Tang@freescale.com>]

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

Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com>
---
 drivers/ata/ahci_qoriq.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/ata/ahci_qoriq.c b/drivers/ata/ahci_qoriq.c
index b9b691e..686d804 100644
--- a/drivers/ata/ahci_qoriq.c
+++ b/drivers/ata/ahci_qoriq.c
@@ -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)
-- 
2.1.0.27.g96db324