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ahci: qoriq: Disable NCQ on ls2080a SoC

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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>
This commit is contained in:
Tang Yuantian 2015-10-29 14:22:16 +08:00 committed by Tejun Heo
parent d19f9aaf01
commit 640847298e
1 changed files with 7 additions and 1 deletions
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8
drivers/ata/ahci_qoriq.c
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@ -131,7 +131,7 @@ static struct ata_port_operations ahci_qoriq_ops = {
.hardreset = ahci_qoriq_hardreset, .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, .flags = AHCI_FLAG_COMMON | ATA_FLAG_NCQ,
.pio_mask = ATA_PIO4, .pio_mask = ATA_PIO4,
.udma_mask = ATA_UDMA6, .udma_mask = ATA_UDMA6,
@ -208,6 +208,12 @@ static int ahci_qoriq_probe(struct platform_device *pdev)
if (rc) if (rc)
goto disable_resources; 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, rc = ahci_platform_init_host(pdev, hpriv, &ahci_qoriq_port_info,
&ahci_qoriq_sht); &ahci_qoriq_sht);
if (rc) if (rc)