On Sat, 3 Jul 2021, Maciej W. Rozycki wrote: > > > Nikolai, can you please give it a hit with the extra debug patch as > > > requested in my other message? > > > > With > > linux-x86-pirq-router-sis85c503.diff applied > > linux-x86-pirq-router-sis85c497.diff applied > > and DEBUG 1 in arch/x86/include/asm/pci_x86.h > > here is new log: > > > > https://pastebin.com/n3udQgcq > > > > My feeling is that something went a bit wrong because: > > > > 8139too 0000:00:0d.0: can't route interrupt > > More important is actually the previous line: > > PCI: Attempting to find IRQ router for [0000:0000] > > meaning that the PIRQ structure defined by the BIOS has not specified the > vendor:device ID pair for the router [1039:0496] which we match against. So it's actually both the vendor:device ID pair and the bus address that matter here. I've now posted a patch I am fairly sure about that combined with the earlier changes it will fix your issue. I have verified it in a simulated environment where the PIRQ routing table has an invalid vendor ID given, with correct results produced: PCI: Attempting to find IRQ router for [0000:0000] PCI: Trying IRQ router for [8086:1250] PCI: Trying IRQ router for [8086:7000] pci 0000:00:07.0: SIO/PIIX/ICH IRQ router [8086:7000] Please let me know of the outcome. Maciej
