Hi, Thomas, On Wed, Dec 8, 2021 at 8:58 AM Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx> wrote: > > Hi, > > I'm getting lots of > > [ 2.940587] pci 0000:00:04.1: EHCI: unrecognized capability ff > [ 2.946478] pci 0000:00:04.1: EHCI: unrecognized capability ff > [ 2.952374] pci 0000:00:04.1: EHCI: unrecognized capability ff > [ 2.958270] pci 0000:00:04.1: EHCI: unrecognized capability ff > [ 2.964166] pci 0000:00:04.1: EHCI: unrecognized capability ff > [ 2.970062] pci 0000:00:04.1: EHCI: unrecognized capability ff > > while booting on a Loongson-3A R4 (Loongson-3A4000) @ 1800MHz system. > What I'm missing ? This is a hardware issue of LS7A bridge. > > I'm also seeing > > [ 1.222546] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0x4 m > ay corrupt adjacent RW1C bits > [ 1.232314] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0x4 m > ay corrupt adjacent RW1C bits > > which look suspicous... This can be avoid and I have send a patch, but hasn't accepted yet. https://lore.kernel.org/linux-pci/20211011074604.854340-2-chenhuacai@xxxxxxxxxxx/T/#u Huacai > > Thomas. > > -- > Crap can work. Given enough thrust pigs will fly, but it's not necessarily a > good idea. [ RFC1925, 2.3 ]
