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 b9b691e..d0f9de9 100644
--- a/drivers/ata/ahci_qoriq.c
+++ b/drivers/ata/ahci_qoriq.c
@@ -131,7 +131,7 @@
.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 @@
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)