+ linux-wireless, linux-pci, devin Thomas Krause <thomaskrause@xxxxxxxxx> writes: >> I had the same problem as well back in the days, for me enabling >> CONFIG_IRQ_REMAP helped. If it helps for you also I wonder if we should >> mention that in the ath11k warning above :) > > CONFIG_IRQ_REMAP did not do the trick. I noticed that the Wi-Fi card > is behind a PCI bridge which is also disabled, could this be a > problem? > > 00:1c.0 PCI bridge: Intel Corporation Device a0b8 (rev 20) (prog-if 00 > [Normal decode]) > Flags: bus master, fast devsel, latency 0, IRQ 123 > Bus: primary=00, secondary=56, subordinate=56, sec-latency=0 > I/O behind bridge: [disabled] > Memory behind bridge: 8c300000-8c3fffff [size=1M] > Prefetchable memory behind bridge: [disabled] > Capabilities: [40] Express Root Port (Slot+), MSI 00 > Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit- > Capabilities: [90] Subsystem: Dell Device 0991 > Capabilities: [a0] Power Management version 3 > Capabilities: [100] Advanced Error Reporting > Capabilities: [220] Access Control Services > Capabilities: [150] Precision Time Measurement > Capabilities: [200] L1 PM Substates > Capabilities: [a00] Downstream Port Containment > Kernel driver in use: pcieport I don't know enough about PCI to say if the bridge is a problem or not. I'm adding linux-wireless and linux-pci in someone can help. Also Devin seems to have a similar problem. To summarise: Thomas is reporting[1] a problem with ath11k on QCA6390 PCI device where he is not having enough MSI vectors. ath11k needs 32 vectors but pci_alloc_irq_vectors() returns -ENOSPC. PCI support is new for ath11k and introduced in v5.10-rc1. The irq allocation code is in drivers/net/wireless/ath/ath11k/pci.c. [2] Can PCI folks help, what could cause this and how to debug it further? I would first try with a full distro kernel config, just in case there's some another important kernel config missing. [1] http://lists.infradead.org/pipermail/ath11k/2020-October/000466.html [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/wireless/ath/ath11k/pci.c#n633 -- https://patchwork.kernel.org/project/linux-wireless/list/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
