linux-kernel - [PATCH] ata: ahci_platform: add 32-bit quirk for dwc-ahci

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Date:   Thu, 6 Feb 2020 13:17:28 +0200
From:   Roger Quadros <rogerq@...com>
To:     <hdegoede@...hat.com>, <axboe@...nel.dk>
CC:     <vigneshr@...com>, <nsekhar@...com>, <linux-ide@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Roger Quadros <rogerq@...com>,
        <stable@...r.kernel.org>
Subject: [PATCH] ata: ahci_platform: add 32-bit quirk for dwc-ahci

On TI Platforms using LPAE, SATA breaks with 64-bit DMA.
Restrict it to 32-bit.

Cc: stable@...r.kernel.org
Signed-off-by: Roger Quadros <rogerq@...com>
---
 drivers/ata/ahci_platform.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 3aab2e3d57f3..b925dc54cfa5 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -62,6 +62,9 @@ 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;
 
+	if (of_device_is_compatible(dev->of_node, "snps,dwc-ahci"))
+		hpriv->flags |= AHCI_HFLAG_32BIT_ONLY;
+
 	port = acpi_device_get_match_data(dev);
 	if (!port)
 		port = &ahci_port_info;
-- 
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