(Adding AceLan) Daniel Drake <drake@xxxxxxxxxxxx> writes: > On Wed, Nov 15, 2017 at 7:38 AM, Daniel Drake <drake@xxxxxxxxxxxx> wrote: >> On Tue, Nov 14, 2017 at 8:15 PM, Kalle Valo <kvalo@xxxxxxxxxxxxxxxx> wrote: >>>> Can't be fixed in firmware, but it would be good to have confirmation >>>> of the hardware behavivour, and maybe some other solution is possible? >>>> Are you following this up within Qualcomm? >>> >>> No time to do that right now, sorry. >> >> I got several autoresponders from people on this thread from Qualcomm >> Taiwan. Would it be useful for us to drop off a sample of the affected >> product at your Taipei or Hsinchu office so that you can investigate >> further? > > Ping - how can we collaborate on this? Are you asking me? While looking at my todo list for this year I doubt I can find time to help with the MSI implementation or bugfixing. But my plan is that first I would apply Russel's patch which makes it possible to enable MSI with a module parameter: https://patchwork.kernel.org/patch/9999249/ Then if AceLan could rebase the quirk patches and resubmit those so that I can apply those: https://patchwork.kernel.org/patch/9971097/ https://patchwork.kernel.org/patch/9971095/ https://patchwork.kernel.org/patch/9971093/ https://patchwork.kernel.org/patch/9971091/ https://patchwork.kernel.org/patch/9971089/ Also I don't see the need to have five different patches for the quirks, having just one patch adding all those should be ok. Are everyone happy with this plan? > Also, we have been testing the MSI support patch and while it seems to > be working fine on AR9565, multiple users hit failures on AR9462. The > most common report is that the system simply cannot maintain the > connection with the AP for more than a few seconds. It hits a check in > mac80211 where it sends a nullfunc to the AP and expects an ack in > less than 500ms, but it disconnects since it doesn't see the ack. > > https://marc.info/?l=linux-wireless&m=151027741010422&w=2 > > We also reproduced a problem in our office with AR9462. With the MSI > support patch in use, we ping a server every second for 1000 seconds > while monitoring "iw dev wlp2s0 link" output. With the MSI support > patch in place, this test fails every time; the connection is dropped > in less than 1000s. > With the patch reverted everything is fine. I'm not really surprised and this is exactly why I was against of enabling MSI by default. It can cause all sorts of weird problems. -- Kalle Valo
