Re: [PATCH -rt] serial: 8250: fix shared interrupts issues under RT kernels

Ingo Molnar
2008-06-24T00:12:41Z

* Anton Vorontsov <avorontsov@ru.mvista.com> wrote:

> 8250's initialization routines relies on the fact that _irqsave
> spinlock will disable local hardirqs, so that the driver can issue
> IRQ-triggering operations before registering the port in the IRQ
> chain.
>
> With RT kernels and preemptable hardirqs this isn't true, _irqsave
> spinlock does not disable local hardirqs, and this causes following
> trace:

again, please let the -rt maintainers sort out which patches need to be
propagated to upstream maintainers.

Ingo