linux-kernel - Re: [PATCH v2] PCI/DPC: Fix PCI legacy interrupt acknowledgement

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Date:   Thu, 15 Mar 2018 13:24:03 +0530
From:   poza@...eaurora.org
To:     Keith Busch <keith.busch@...el.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dongdong Liu <liudongdong3@...wei.com>,
        Wei Zhang <wzhang@...com>, Sinan Kaya <okaya@...eaurora.org>,
        Timur Tabi <timur@...eaurora.org>
Subject: Re: [PATCH v2] PCI/DPC: Fix PCI legacy interrupt acknowledgement

On 2018-03-15 02:22, Keith Busch wrote:
> On Wed, Mar 14, 2018 at 09:20:48PM +0530, Oza Pawandeep wrote:
>> Current DPC driver acknowledges the interrupt in deferred work, which 
>> works
>> since MSI are edge triggered.
>> 
>> But when MSI is disabled (e.g. pci=nomsi boot option) port service
>> driver falls back to PCI legacy INT interrupt.
>> 
>> With current code we do not acknowledge the interrupt back in 
>> dpc_irq()
>> and we get dpc interrupt storm.
>> 
>> This patch acknowledges the interrupt in interrupt handler.
>> 
>> Signed-off-by: Oza Pawandeep <poza@...eaurora.org>
> 
> Thanks, this looks good to me.
> 
> Reviewed-by: Keith Busch <keith


checkpatch script shows
WARNING: 'acknowledgement' may be misspelled - perhaps 'acknowledgment'?

but dictionaries shows acknowledgement.

Regards,
Oza.