Hello,

I am unable to test with the kernel you provided, because my tuner card
doesn't have driver in mainline kernel tree. So I have to compile it
myself and I need kernel headers for this.

So I compiled kernel 4.16 from debian linux-source-4.16 package and
applied the patch you provided:

>From dd0375ffba55172194999d40b35344e9dc2682df Mon Sep 17 00:00:00 2001
From: "Guilherme G. Piccoli" <gpicc...@canonical.com>
Date: Wed, 11 Apr 2018 11:04:13 +0000
Subject: [PATCH] xhci: Add quirk to ASMedia 0x1242 adapter to avoid BEI

Signed-off-by: Guilherme G. Piccoli <gpicc...@canonical.com>
---
 drivers/usb/host/xhci-pci.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index d9f831b..0654461 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -213,6 +213,12 @@ static void xhci_pci_quirks(struct device *dev, struct 
xhci_hcd *xhci)
                xhci->quirks |= XHCI_TRUST_TX_LENGTH;

        if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
+                       pdev->device == 0x1242) {
+               xhci->quirks |= XHCI_AVOID_BEI;
+               pr_warn("QUIRK: XHCI_AVOID_BEI");
+       }
+
+       if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA &&
                pdev->device == PCI_DEVICE_ID_ASMEDIA_1042A_XHCI)
                xhci->quirks |= XHCI_ASMEDIA_MODIFY_FLOWCONTROL;

--
2.7.4

Compiled my tuner card driver now and I am testing.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1749961

Title:
  xhci_hcd: TRB DMA errors reported with ASMedia ASM1142 USB 3.1
  Controller

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Artful:
  In Progress
Status in linux source package in Bionic:
  In Progress
Status in linux package in Debian:
  New

Bug description:
  It was observed that while trying to use a 4K USB webcam connected to
  USB port provided by ASMedia ASM1142 USB 3.1 Controller, the webcam
  does not work and kernel log shows the following messages:

  [431.928016] xhci_hcd 0000:12:00.0: ERROR Transfer event TRB DMA ptr not part 
of current TD ep_index 2 comp_code 13
  [431.928021] xhci_hcd 0000:12:00.0: Looking for event-dma 0000003f3330e020 
trb-start 0000003f3330e000 trb-end 0000003f3330e000 seg-start 0000003f3330e000 
seg-end 0000003f3330eff0
  [431.928024] xhci_hcd 0000:12:00.0: ERROR Transfer event TRB DMA ptr not part 
of current TD ep_index 2 comp_code 13
  [431.928026] xhci_hcd 0000:12:00.0: Looking for event-dma 0000003f3330e030 
trb-start 0000003f3330e000 trb-end 0000003f3330e000 seg-start 0000003f3330e000 
seg-end 0000003f3330eff0
  [431.928027] xhci_hcd 0000:12:00.0: ERROR Transfer event TRB DMA ptr not part 
of current TD ep_index 2 comp_code 13
  [431.928029] xhci_hcd 0000:12:00.0: Looking for event-dma 0000003f3330e050 
trb-start 0000003f3330e000 trb-end 0000003f3330e000 seg-start 0000003f3330e000 
seg-end 0000003f3330eff0
  [431.928386] xhci_hcd 0000:12:00.0: ERROR Transfer event TRB DMA ptr not part 
of current TD ep_index 2 comp_code 13

  A similar issue was already reported on Launchpad:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1667750

  The fix to this issue seems to be the following patch:
  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9da5a109

  Tests in our scenario with this patch proved still broken. Our next
  approach is to modify the patch a bit and re-test.

  This LP will be used to document our progress in the investigation.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1749961/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to     : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp

Reply via email to