patch "usb: xhci: Fix ASM2142/ASM3142 DMA addressing" added to usb-linus

This is a note to let you know that I've just added the patch titled

usb: xhci: Fix ASM2142/ASM3142 DMA addressing

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From dbb0897e805f2ab1b8bc358f6c3d878a376b8897 Mon Sep 17 00:00:00 2001
From: Forest Crossman <[email protected]>
Date: Fri, 17 Jul 2020 06:27:34 -0500
Subject: usb: xhci: Fix ASM2142/ASM3142 DMA addressing

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.

---
 drivers/usb/host/xhci-pci.c | 3 +++
 1 file changed, 3 insertions(+)

index ef513c2fb843..9234c82e70e4 100644
@@ -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)

2.27.0