Hi Guilherme, Thanks for the response. I have several (3) quad port ASMedia 2142 PCIe/USB 3.1 cards installed in a Dell R740 rack server. I am using the standard Ubuntu 18.04 kernel (Linux dell-PowerEdge-R740 4.15.0-36-generic #39-Ubuntu SMP Mon Sep 24 16:19:09 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux).
For one of my applications, it runs a loop that opens and closes a high speed connection to a USB device connected through the ASMedia board. After this goes on for several minutes without any issues, I see this in dmesg: [Oct 5 10:12] xhci_hcd 0000:be:00.0: WARN Set TR Deq Ptr cmd failed due to incorrect slot or ep state. [ +3.418076] xhci_hcd 0000:be:00.0: WARN Successful completion on short TX [ +0.000035] xhci_hcd 0000:be:00.0: ERROR Transfer event TRB DMA ptr not part of current TD ep_index 12 comp_code 1 [ +0.000003] xhci_hcd 0000:be:00.0: Looking for event-dma 0000001fe9759610 trb-start 0000001fe9759620 trb-end 0000001fe9759620 seg-start 0000001fe9759000 seg-end 0000001fe9759ff0 This is then followed shortly after by several kernel dump messages, and then the whole system starts behaving erratically, requiring a hard reboot to recover. The condition is easy for me to reproduce and I will happily provide any logs that may be of use to help debug this. Please just let me know what you would like and how to get them (as I am not a kernel expert). Thanks, Roy -- 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: Won't Fix Status in linux source package in Bionic: In Progress Status in linux package in Debian: Confirmed 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
