Re: [Xen-devel] [PATCH 0/4] ns16550: enable support for Pericom controllers

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 29.02.16 at 17:56, <konrad.wilk@xxxxxxxxxx> wrote:
> On Tue, Feb 23, 2016 at 04:22:35AM -0700, Jan Beulich wrote:
>> Patches 1 and 2 are meant to go in. Patch 3 is a prerequisite to patch
>> 4 and may go in as well, but patch 4 is RFC because with the Pericom
>> board I have MSI doesn't appear to function. Since it also does not
>> work in baremetal Linux when doing the trivial adjustments needed in
>> its driver, I suspect the feature doesn't work in general, which is
>> supported by the observation that the device continues to assert
>> INTx despite the MSI enable bit being set (causing unclaimed IRQs
>> until that IRQ gets shut off). While I got some responses back from
>> Pericom support, no actual statement of whether MSI is actually
>> known to work on their boards was ever made by them. I _think_
>> patch 4 is correct (and hence could go in), but I have no way of
>> proving this by testing.
>> 
>> 1: ns16550: store pointer to config parameters for PCI
>> 2: ns16550: enable Pericom controller support
>> 3: console: adjust IRQ initialization
>> 4: ns16550: enable use of PCI MSI
>> 
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>> 
>> (Konrad, I'd appreciate if you could double check that I didn't
>> accidentally break the Oxford controller support.)
> 
> Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>

Thanks!

Jan


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