From: Forest Crossman <cyrozap@gmail.com>
To: linux-usb@vger.kernel.org
Cc: Forest Crossman <cyrozap@gmail.com>,
mathias.nyman@intel.com, gregkh@linuxfoundation.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] usb: xhci: Fix ASM2142/ASM3142 DMA addressing
Date: Fri, 17 Jul 2020 06:27:34 -0500 [thread overview]
Message-ID: <20200717112734.328432-1-cyrozap@gmail.com> (raw)
The ASM2142/ASM3142 (same PCI IDs) does not support full 64-bit DMA
addresses, which can cause silent memory corruption or IOMMU errors on
platforms that use the upper bits. Add the XHCI_NO_64BIT_SUPPORT quirk
to fix this issue.
Signed-off-by: Forest Crossman <cyrozap@gmail.com>
---
drivers/usb/host/xhci-pci.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index ef513c2fb843..9234c82e70e4 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -265,6 +265,9 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
pdev->device == 0x1142)
xhci->quirks |= XHCI_TRUST_TX_LENGTH;
+ if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
+ pdev->device == 0x2142)
+ xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
pdev->device == PCI_DEVICE_ID_ASMEDIA_1042A_XHCI)
--
2.20.1
reply other threads:[~2020-07-17 11:28 UTC|newest]
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