> Gesendet: Dienstag, 03. November 2020 um 11:16 Uhr
> Von: "Thomas Gleixner" <t...@linutronix.de>
> Any architecture which selects PCI_MSI_ARCH_FALLBACKS and does not have
> irqdomain support runs into:
>
> if (!d)
> bus->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
>
> which in turn makes pci_msi_supported() return 0 and consequently makes
> pci_enable_msi[x]() fail.
i'm not that deep into this, but just my thoughts...you are the experts :)
checking for PCI_MSI_ARCH_FALLBACKS here does not help?
something like this:
#ifndef PCI_MSI_ARCH_FALLBACKS
if (!d)
bus->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
#endif
imho pci_enable_msi[x]() does not do anything if there is no msi-support (or
does not get called), so maybe check the PCI_BUS_FLAGS_NO_MSI before the call
(if this is inside core) or inside the enable-function (if called from
outside)....
or is this the issue marc talkes about (called before flag is set)?
regards Frank
