[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20191119051407.639411260@linuxfoundation.org>
Date: Tue, 19 Nov 2019 06:15:33 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Suman Trpathi <stripathi@...erecomputing.com>,
Rameshwar Prasad Sahu <rameshwar.sahu@...erecomputing.com>,
Jens Axboe <axboe@...nel.dk>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 136/422] ata: Disable AHCI ALPM feature for Ampere Computing eMAG SATA
From: Suman Tripathi <stripathi@...erecomputing.com>
[ Upstream commit 20bdc376b427cb420836f39ee8f281ea85dbaeef ]
Due to hardware errata, Ampere Computing eMAG SATA can't support
AHCI ALPM feature. This patch disables the AHCI ALPM feature for
eMAG SATA.
Signed-off-by: Suman Trpathi <stripathi@...erecomputing.com>
Signed-off-by: Rameshwar Prasad Sahu <rameshwar.sahu@...erecomputing.com>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/ata/ahci_platform.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 46f0bd75eff79..cf1e0e18a7a98 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -33,6 +33,13 @@ static const struct ata_port_info ahci_port_info = {
.port_ops = &ahci_platform_ops,
};
+static const struct ata_port_info ahci_port_info_nolpm = {
+ .flags = AHCI_FLAG_COMMON | ATA_FLAG_NO_LPM,
+ .pio_mask = ATA_PIO4,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &ahci_platform_ops,
+};
+
static struct scsi_host_template ahci_platform_sht = {
AHCI_SHT(DRV_NAME),
};
@@ -41,6 +48,7 @@ static int ahci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct ahci_host_priv *hpriv;
+ const struct ata_port_info *port;
int rc;
hpriv = ahci_platform_get_resources(pdev,
@@ -58,7 +66,11 @@ static int ahci_probe(struct platform_device *pdev)
if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
- rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info,
+ port = acpi_device_get_match_data(dev);
+ if (!port)
+ port = &ahci_port_info;
+
+ rc = ahci_platform_init_host(pdev, hpriv, port,
&ahci_platform_sht);
if (rc)
goto disable_resources;
@@ -85,6 +97,7 @@ static const struct of_device_id ahci_of_match[] = {
MODULE_DEVICE_TABLE(of, ahci_of_match);
static const struct acpi_device_id ahci_acpi_match[] = {
+ { "APMC0D33", (unsigned long)&ahci_port_info_nolpm },
{ ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
{},
};
--
2.20.1
Powered by blists - more mailing lists