On 2013-02-28, Peter Hurley <peter@xxxxxxxxxxxxxxxxxx> wrote:
> On Wed, 2013-02-13 at 15:24 +0000, Grant Edwards wrote:
>> For a polled serial driver that doesn't use interrupts, to what should
>> the "irq" field in the uart_port structure be set? Should it be 0?
>> Should it be the unused IRQ associated with the PCI card slot in which
>> the board is found?
>
> Doesn't look supported, but adding the support doesn't look difficult.
> At the very least, a patch is required so that on port shutdown, the
> core doesn't synchronize_irq().
Does the call ty synchronize_irq() do any harm? AFAICT, it will just
cause a short delay if handling of that IRQ is in-progress.
I currently set the "irq" field to the IRQ number that would be used
by the board if I did choose to enable interrupts. That seems to work
fine (with rather limited testing).
--
Grant Edwards grant.b.edwards Yow! We just joined the
at civil hair patrol!
gmail.com
--
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
