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: Tang Yuantian <Yuantian.Tang@freescale.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/drivers/ata/ahci_qoriq.c b/drivers/ata/ahci_qoriq.c
index b9b691e83e1756253c2de28ceb39f3478a2812d6..d0f9de96e4ea626a44b30506b239105869fb2eb5 100644 (file)
--- 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)