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From: "Pali Rohár" <pali@kernel.org>
To: Marc Zyngier <maz@kernel.org>
Cc: "Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Rob Herring" <robh@kernel.org>, "Marek Behún" <kabel@kernel.org>,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/7] PCI: aardvark: Check for virq mapping when processing INTx IRQ
Date: Mon, 23 Aug 2021 18:33:05 +0200	[thread overview]
Message-ID: <20210823163305.okizte3ejnm6ltra@pali> (raw)
In-Reply-To: <f38ad6edfb6ee63f273a430154e1038f@kernel.org>

On Friday 06 August 2021 09:29:02 Marc Zyngier wrote:
> On 2021-06-25 10:03, Pali Rohár wrote:
> > It is possible that we receive spurious INTx interrupt. So add needed
> > check
> > before calling generic_handle_irq() function.
> > 
> > Signed-off-by: Pali Rohár <pali@kernel.org>
> > Reviewed-by: Marek Behún <kabel@kernel.org>
> > Cc: stable@vger.kernel.org
> > ---
> >  drivers/pci/controller/pci-aardvark.c | 6 +++++-
> >  1 file changed, 5 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/pci/controller/pci-aardvark.c
> > b/drivers/pci/controller/pci-aardvark.c
> > index 36fcc077ec72..59f91fad2481 100644
> > --- a/drivers/pci/controller/pci-aardvark.c
> > +++ b/drivers/pci/controller/pci-aardvark.c
> > @@ -1226,7 +1226,11 @@ static void advk_pcie_handle_int(struct advk_pcie
> > *pcie)
> >  			    PCIE_ISR1_REG);
> > 
> >  		virq = irq_find_mapping(pcie->irq_domain, i);
> > -		generic_handle_irq(virq);
> > +		if (virq)
> > +			generic_handle_irq(virq);
> > +		else
> > +			dev_err_ratelimited(&pcie->pdev->dev, "unexpected INT%c IRQ\n",
> > +					    (char)i+'A');
> >  	}
> >  }
> 
> Please use generic_handle_domain_irq() instead of irq_find_mapping()
> and generic_handle_irq().

Ok! At the time when I was sending these patches there was no function
generic_handle_domain_irq().

As all these interrupt related patches are targeting also stable tress
where is no generic_handle_domain_irq() function too, it would be easier
for backporting to use irq_find_mapping() + generic_handle_irq(). And
later after applying all interrupt related patches, include a patch
which converts all usage to generic_handle_domain_irq().

> Thanks,
> 
>         M.
> -- 
> Jazz is not dead. It just smells funny...

  reply	other threads:[~2021-08-23 16:33 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-25  9:03 [PATCH 0/7] PCI: aardvark: Interrupt fixes Pali Rohár
2021-06-25  9:03 ` [PATCH 1/7] PCI: aardvark: Do not touch status bits of masked interrupts in interrupt handler Pali Rohár
2021-06-25  9:03 ` [PATCH 2/7] PCI: aardvark: Check for virq mapping when processing INTx IRQ Pali Rohár
2021-08-06  8:29   ` Marc Zyngier
2021-08-23 16:33     ` Pali Rohár [this message]
2021-08-23 16:47       ` Marc Zyngier
2021-06-25  9:03 ` [PATCH 3/7] PCI: aardvark: Remove irq_mask_ack callback for INTx interrupts Pali Rohár
2021-06-25  9:03 ` [PATCH 4/7] PCI: aardvark: Don't mask irq when mapping Pali Rohár
2021-06-25  9:03 ` [PATCH 5/7] PCI: aardvark: Fix support for MSI interrupts Pali Rohár
2021-06-25  9:03 ` [PATCH 6/7] PCI: aardvark: Correctly clear and unmask all " Pali Rohár
2021-08-06  8:32   ` Marc Zyngier
2021-08-06  8:35     ` Pali Rohár
2021-08-23 16:42       ` Pali Rohár
2021-06-25  9:03 ` [PATCH 7/7] PCI: aardvark: Fix setting MSI address Pali Rohár
2021-08-05 17:35 ` [PATCH 0/7] PCI: aardvark: Interrupt fixes Pali Rohár

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