From: jmflinuxtx on gitlab.com As reported in https://bugzilla.kernel.org/206217 , raw_violation_fixup is causing more harm than good in some common use-cases.
This patch as RFC is a partial revert of the 191cd6fb5 commit: "PCI: tegra: Add SW fixup for RAW violations" that was first introduced in 5.3 kernel. This fix the following regression since then. When using both the network NIC and I/O on MMC this can lead to the following message on jetson-tk1: NETDEV WATCHDOG: enp1s0 (r8169): transmit queue 0 timed out and pcieport 0000:00:02.0: AER: Uncorrected (Non-Fatal) error received: 0000:01:00.0 r8169 0000:01:00.0: AER: PCIe Bus Error: severity=Uncorrected (Non- Fatal), type=Transaction Layer, (Requester ID) r8169 0000:01:00.0: AER: device [10ec:8168] error status/mask=00004000/00400000 r8169 0000:01:00.0: AER: [14] CmpltTO (First) r8169 0000:01:00.0: AER: can't recover (no error_detected callback) pcieport 0000:00:02.0: AER: device recovery failed After that, the ethernet NIC isn't functional anymore even after reloading the module. After a reboot, this is reproducible by copying a large file over the ethernet NIC to the MMC. For some reasons this cannot be reproduced when the same file is copied to a tmpfs. This patch is RFC because it requires more understanding from Nvidia. - Is the fixup (available in l4t downstrem) still needed for upstream ? - Is there a need to update the fixup values for upstream ? - If the fixup is reverted, does the hw bug can still be seen with upstream ? Others can also provides more understanding: - Conditions to reproduce the bug (or not)... Signed-off-by: Nicolas Chauvet <kwiz...@gmail.com> Upstream Status: https://patchwork.ozlabs.org/project/linux- tegra/patch/20200420164304.28810-1-kwiz...@gmail.com/ Note: The patch series is too large to sent by email. To review the series locally, set up your repository to fetch from the GitLab remote: $ git remote add gitlab https://gitlab.com/cki-project/kernel-ark.git $ git config remote.gitlab.fetch '+refs/merge-requests/*/head:refs/remotes/gitlab/merge-requests/*' $ git fetch gitlab Finally, check out the merge request: $ git checkout gitlab/merge-requests/427 It is also possible to review the merge request on GitLab at: https://gitlab.com/cki-project/kernel-ark/-/merge_requests/427 _______________________________________________ kernel mailing list -- kernel@lists.fedoraproject.org To unsubscribe send an email to kernel-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/kernel@lists.fedoraproject.org
