pci_alloc_irq_vectors fails ENOSPC for XPS 13 9310

[Stefani Seibold]

Am Donnerstag, den 12.11.2020, 02:10 +0100 schrieb wi nk:
> I've yet to see any instability after 45 minutes of exercising it, I
> do see a couple of messages that came out of the driver:
> 
> [    8.963389] ath11k_pci 0000:55:00.0: Unknown eventid: 0x16005
> [   11.342317] ath11k_pci 0000:55:00.0: Unknown eventid: 0x1d00a
> 
> then when it associates:
> 
> [   16.718895] wlp85s0: send auth to ec:08:6b:27:01:ea (try 1/3)
> [   16.722636] wlp85s0: authenticated
> [   16.724150] wlp85s0: associate with ec:08:6b:27:01:ea (try 1/3)
> [   16.726486] wlp85s0: RX AssocResp from ec:08:6b:27:01:ea
> (capab=0x411 status=0 aid=8)
> [   16.738443] wlp85s0: associated
> [   16.764966] IPv6: ADDRCONF(NETDEV_CHANGE): wlp85s0: link becomes
> ready
> 
> The adapter is achieving around 500 mbps on my gigabit connection, my
> 2018 mbp sees around 650, so it's doing pretty well so far.
> 
> Stefani - when you applied the patch that Kalle shared, which branch
> did you apply it to?  I applied it to ath11k-qca6390-bringup and when
> I revert 7fef431be9c9 there is a small merge conflict I needed to
> resolve.  I wonder if either the starting branch, or your chosen
> resolution are related to the instability you see (or I'm just lucky
> so far! :)).
> 

I used the vanilla kernel tree 
https://git.kernel.org/torvalds/t/linux-5.10-rc2.tar.gz. On top of this
i applied the 

RFT-ath11k-pci-support-platforms-with-one-MSI-vector.patch

and reverted the patch 7fef431be9c9