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authorTang Yuantian <Yuantian.Tang@freescale.com>2015-10-29 14:22:16 +0800
committerTejun Heo <tj@kernel.org>2015-10-31 09:52:15 +0900
commit640847298e2b7f19e1376cf5a6fda0fce5d96fb2 (patch)
tree85931ec915867792a8b9b9f4fd6aaf7394ea7aca
parentd19f9aaf01341bd02da3aca3197751f52155551a (diff)
downloadop-kernel-dev-640847298e2b7f19e1376cf5a6fda0fce5d96fb2.zip
op-kernel-dev-640847298e2b7f19e1376cf5a6fda0fce5d96fb2.tar.gz
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>
-rw-r--r--drivers/ata/ahci_qoriq.c8
1 files changed, 7 insertions, 1 deletions
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 @@ 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)
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