netdev - Re: [PATCH net v2] nfp: correct number of MSI vectors requests returned

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Date:   Wed, 19 Apr 2023 18:34:09 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     David Laight <David.Laight@...LAB.COM>
Cc:     'Louis Peens' <louis.peens@...igine.com>,
        David Miller <davem@...emloft.net>,
        Paolo Abeni <pabeni@...hat.com>,
        Leon Romanovsky <leon@...nel.org>,
        Simon Horman <simon.horman@...igine.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "oss-drivers@...igine.com" <oss-drivers@...igine.com>
Subject: Re: [PATCH net v2] nfp: correct number of MSI vectors requests
 returned

On Wed, 19 Apr 2023 15:37:57 +0000 David Laight wrote:
> > Before the referenced commit, if fewer interrupts are supported by
> > hardware than requested, then pci_msix_vec_count() returned the
> > former. However, after the referenced commit, an error is returned
> > for this condition. This causes a regression in the NFP driver
> > preventing probe from completing.  
> 
> I believe the relevant change to the msix vector allocation
> function has been reverted.
> (Or at least, the over-zealous check of nvec removed.)
> 
> So this change to bound the number of interrupts
> isn't needed.

Great, thanks, I was about to ask!
-- 
pw-bot: cr