Messages in this thread | | | From | Kalle Valo <> | Subject | Re: [PATCH] wireless: ath10k: Return early in ath10k_qmi_event_server_exit() to avoid hard crash on reboot | Date | Mon, 08 Jun 2020 14:37:05 +0300 |
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Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> writes:
> On Tue, Jun 02, 2020 at 01:04:26PM -0700, Brian Norris wrote: >> On Tue, Jun 2, 2020 at 12:40 PM John Stultz <john.stultz@linaro.org> wrote: >> > On Tue, Jun 2, 2020 at 12:16 PM Brian Norris <briannorris@chromium.org> wrote: >> > > On Mon, Jun 1, 2020 at 10:25 PM John Stultz <john.stultz@linaro.org> wrote: >> > > > >> > > > Ever since 5.7-rc1, if we call >> > > > ath10k_qmi_remove_msa_permission(), the db845c hard crashes on >> > > > reboot, resulting in the device getting stuck in the usb crash >> > > > debug mode and not coming back up wihthout a hard power off. >> > > > >> > > > This hack avoids the issue by returning early in >> > > > ath10k_qmi_event_server_exit(). >> > > > >> > > > A better solution is very much desired! >> > > >> > > Any chance you can bisect what caused this? There are a lot of >> > > non-ath10k pieces involved in this stuff. >> > >> > Amit had spent some work on chasing it down to the in kernel qrtr-ns >> > work, and reported it here: >> > https://lists.infradead.org/pipermail/ath10k/2020-April/014970.html >> > >> > But that discussion seemingly stalled out, so I came up with this hack >> > to workaround it for us. >> >> If I'm reading it right, then that means we should revert this stuff >> from v5.7-rc1: >> >> 0c2204a4ad71 net: qrtr: Migrate nameservice to kernel from userspace >> >> At least, until people can resolve the tail end of that thread. New >> features (ath11k, etc.) are not a reason to break existing features >> (ath10k/wcn3990). > > I don't agree with this. If you read through the replies to the bug report, > it is clear that NS migration uncovered a corner case or even a bug. So we > should try to fix that indeed.
I'm with Mani, we should try to fix ath10k instead. Hopefully we can find a fix soon.
Forcing QCA6390 users to use the userspace qrtr-ns would be bad user experience, I really would want to avoid that.
-- https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
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