Re: [PATCH] PCI: Mark INTx masking support of Chelsio T310 10GbE NIC as broken

["Michael S. Tsirkin" <mst@redhat.com>]

On Mon, May 28, 2012 at 03:29:58PM +0200, Jan Kiszka wrote:
> On 2012-05-28 15:21, Michael S. Tsirkin wrote:
> > On Mon, May 28, 2012 at 02:51:25PM +0200, Jan Kiszka wrote:
> >> On 2012-05-28 14:39, Michael S. Tsirkin wrote:
> >>> On Fri, May 25, 2012 at 11:02:13AM -0300, Jan Kiszka wrote:
> >>>> According to Alexey, the T310 does not properly support INTx masking as
> >>>> it fails to keep the PCI_STATUS_INTERRUPT bit updated once the interrupt
> >>>> is masked. Mark this adapter as broken so that pci_intx_mask_supported
> >>>> won't report it as compatible.
> >>>>
> >>>> Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> >>>> Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
> >>>
> >>>
> >>> Just a thought: would be nice to have a way to discover
> >>> the quirk was activated. Add an attribute so that
> >>> userspace can detect and report this properly to users?
> >>> Or just log a warning message ...
> >>
> >> pr_notice_once?
> > 
> > OK IMO.
> > 
> >> A flag for userspace would be significantly more
> >> complicated (and not PCI layer hands).
> > 
> > Why not? I meant e.g. an attribute in pci-sysfs.
> 
> Possible. But what is the preferred way of doing this? Are there any
> precedences?
> 
> Jan
> 

E.g. a reset attribute is there only if device reset is supported.
I don't insist on this - merely asking how does userspace report
an attempt to share IRQs and whether the reason is
discoverable in some way.

-- 
MST