linux-kernel - Re: [PATCH v3 04/25] i2c: designware: Let PCI core to take care about interrupt vectors

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Date:   Wed, 15 Nov 2023 15:54:49 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Jarkko Nikula <jarkko.nikula@...ux.intel.com>
Cc:     Mario Limonciello <mario.limonciello@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Wolfram Sang <wsa@...nel.org>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Jan Dabros <jsd@...ihalf.com>,
        Andi Shyti <andi.shyti@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Hans de Goede <hdegoede@...hat.com>
Subject: Re: [PATCH v3 04/25] i2c: designware: Let PCI core to take care
 about interrupt vectors

On Wed, Nov 15, 2023 at 02:08:10PM +0200, Jarkko Nikula wrote:
> On 11/10/23 20:11, Andy Shevchenko wrote:

...

> > @@ -360,9 +354,6 @@ static void i2c_dw_pci_remove(struct pci_dev *pdev)
> >   	pm_runtime_forbid(&pdev->dev);
> >   	pm_runtime_get_noresume(&pdev->dev);
> > -
> > -	devm_free_irq(&pdev->dev, dev->irq, dev);
> > -	pci_free_irq_vectors(pdev);
> 
> Instead of commit 21aa3983d619 I guess this patch is more around my commit
> 9be8bc4dd617 ("i2c: designware-pci: Fix BUG_ON during device removal")?

No, this one exactly what it says. Your patch is the side effect of the above
mentioned change.

> But
> still I don't think it qualifies Fixes tag?

Up to you, I can remove the fixes tag altogether, but it has the correct
commit ID there.

> I was curious to see would this patch bring back above BUG_ON and
> fortunately not (rmmod/modprobe i2c_designware_pci on MSI enabled
> instance):-)

How? PCI clean up will happen on the level of pcim_enable_device(),
i.e. quite after the IRQ will be freed.

-- 
With Best Regards,
Andy Shevchenko