Folks!
There are more and more people worried about these usually harmless
warnings:
do_IRQ: 0.39 No irq handler for vector
It took a while to figure out why that happens and why it is harmless for
most interrupts, but there is also a real issue hidden for level type
IOAPIC interrupts.
The following commits in Linus tree are addressing the issue:
b7107a67f0d1 ("x86/irq: Handle spurious interrupt after shutdown gracefully")
dfe0cf8b51b0 ("x86/ioapic: Implement irq_get_irqchip_state() callback")
62e0468650c3 ("genirq: Add optional hardware synchronization for shutdown")
1d21f2af8571 ("genirq: Fix misleading synchronize_irq() documentation")
4001d8e8762f ("genirq: Delay deactivation in free_irq()")
There is another one which makes sense to be backported:
f8a8fe61fec8 ("x86/irq: Seperate unused system vectors from spurious entry again")
These should go back to 4.19, but not farther.
They apply cleanly to 5.1 and 5.2. A backport to 4.19 is attached.
Thanks,
tglx
Attachment:
patches-4.19.tar.bz2
Description: Binary data
