linux-kernel - Re: [PATCH V3 10/10] vfio/pci: Clear VFIO_IRQ_INFO

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Date:   Wed, 19 Apr 2023 11:13:54 -0700
From:   Reinette Chatre <reinette.chatre@...el.com>
To:     Alex Williamson <alex.williamson@...hat.com>
CC:     <jgg@...dia.com>, <yishaih@...dia.com>,
        <shameerali.kolothum.thodi@...wei.com>, <kevin.tian@...el.com>,
        <tglx@...utronix.de>, <darwi@...utronix.de>, <kvm@...r.kernel.org>,
        <dave.jiang@...el.com>, <jing2.liu@...el.com>,
        <ashok.raj@...el.com>, <fenghua.yu@...el.com>,
        <tom.zanussi@...ux.intel.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V3 10/10] vfio/pci: Clear VFIO_IRQ_INFO_NORESIZE for MSI-X

Hi Alex,

On 4/18/2023 3:38 PM, Alex Williamson wrote:
> On Tue, 18 Apr 2023 10:29:21 -0700
> Reinette Chatre <reinette.chatre@...el.com> wrote:
> 

...

>> diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c
>> index a3635a8e54c8..4050ad3388c2 100644
>> --- a/drivers/vfio/pci/vfio_pci_core.c
>> +++ b/drivers/vfio/pci/vfio_pci_core.c
>> @@ -1114,7 +1114,9 @@ static int vfio_pci_ioctl_get_irq_info(struct vfio_pci_core_device *vdev,
>>  	if (info.index == VFIO_PCI_INTX_IRQ_INDEX)
>>  		info.flags |=
>>  			(VFIO_IRQ_INFO_MASKABLE | VFIO_IRQ_INFO_AUTOMASKED);
>> -	else
>> +	else if ((info.index != VFIO_PCI_MSIX_IRQ_INDEX) ||
>> +		 (info.index == VFIO_PCI_MSIX_IRQ_INDEX &&
>> +		  !vdev->has_dyn_msix))
> 
> Isn't this the same as:
> 
> 	(info.index != VFIO_PCI_MSIX_IRQ_INDEX || !vdev->has_dyn_msix)
> 

Yes, it is. Will fix. Thank you very much.

Reinette