On Thu, Jan 11 2024 at 10:58, Vidya Sagar wrote: > While calculating the hwirq number for an MSI interrupt, the higher > bits (i.e. from bit-5 onwards a.k.a domain_nr >= 32) of the PCI domain > number gets truncated because of the shifted value casting to return > type of pci_domain_nr() which is 'int'. This for example is resulting > in same hwirq number for devices 0019:00:00.0 and 0039:00:00.0. > > So, cast the PCI domain number to 'irq_hw_number_t' before left shifting > it to calculate hwirq number. This still does not explain that this fixes it only on 64-bit platforms and why we don't care for 32-bit systems.
