linux-kernel - Re: pci_alloc_irq_vectors use in 8250

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Message-ID: <CAHp75VdX4qpgJ+ELXGCZhEb6Tea_6gOj2sNiy72Bo=wyVsLbfA@mail.gmail.com>
Date:   Mon, 10 Oct 2016 01:01:04 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: pci_alloc_irq_vectors use in 8250_lpss.c

On Sun, Oct 9, 2016 at 8:56 PM, Christoph Hellwig <hch@....de> wrote:
> Hi Andy,
>
> two comment on your ぱatch to add MSI support to the above driver.
>
> First pci_alloc_irq_vectors gained a mandatory flags argument, so
> for MSI suport you now need to pass PCI_IRQ_MSI in flags for the
> code to work.

I will check this. Thanks for pointing to it.

>
> Second please make sure to always pair pci_alloc_irq_vectors
> with pci_free_irq_vectors on the remove path.

For my opinion it should be done in PCI code since I'm using
manageable resources. It's already done for all PCI API usually used
at ->probe().


-- 
With Best Regards,
Andy Shevchenko