Re: [Xen-devel] Re: [PATCH] make c/s 21089 work again with c/s 21092

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

>>> Konrad Rzeszutek Wilk  04/13/10 6:12 PM >>>
>On Tue, Apr 13, 2010 at 04:53:35PM +0100, Jan Beulich wrote:
>> I'm talking about PCI serial cards - in the one case I'm working with,
>
>Can't you use polling for it? For example this is what I do for my PCI
>serial card:
>
>com1=115200,8n1,0xd800,0

It works with low rates of output, but in order to not use sync_console and 
still be able to reliably get through high rate bursts of output, interrupt 
driven communication seems to be the only reliable way (other than using 
unreasonably high values with "serial_tx_buffer=").

And also from a more general perspective - why should legacy IRQs work, but not 
PCI ones?

Jan


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