On Fri, 31 Jul 2015, Taichi Kageyama wrote:
> On 2015/07/31 8:43, Peter Hurley wrote:
> >> If you look at the actual autoprobe users aside of 8250. That's really
> >> all ancient ISA hardware and hardly interesting. So all we really care
> >> about are the 8250 serial ports.
>
> In this case, I think [patch v2 1/3] is enough.
> console_lock is required in autoconfig_irq() to resolve other race conditions
> before calling probe_irq_on().
Fine with me.
> >> So why are you interested in that serial irq autoprobe crap at all?
> >
> Because RHEL6 uses CONFIG_SERIAL_8250_DETECT_IRQ=y unfortunately.
Doh!
> I already got the following console solutions after discussion with Peter.
> - Force set irq before any APs and getty open /dev/console.
> Users have to know valid irq#.
> - Fix FW to define PNP
> - CONFIG_SERIAL_8250_DETECT_IRQ=n
Ack!
Thanks,
tglx
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