linux-kernel - Re: [PATCH v6 5/5] vfio/pci: Implement VFIO_DEVICE_FEATURE_LOW_POWER_ENTRY_WITH

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Date:   Thu, 18 Aug 2022 22:31:03 +0530
From:   Abhishek Sahu <abhsahu@...dia.com>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     Alex Williamson <alex.williamson@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Yishai Hadas <yishaih@...dia.com>,
        Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>,
        Kevin Tian <kevin.tian@...el.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Max Gurtovoy <mgurtovoy@...dia.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH v6 5/5] vfio/pci: Implement
 VFIO_DEVICE_FEATURE_LOW_POWER_ENTRY_WITH_WAKEUP

On 8/17/2022 11:10 PM, Jason Gunthorpe wrote:
> On Wed, Aug 17, 2022 at 09:34:30PM +0530, Abhishek Sahu wrote:
>> On 8/17/2022 7:23 PM, Jason Gunthorpe wrote:
>>> On Wed, Aug 17, 2022 at 10:43:23AM +0530, Abhishek Sahu wrote:
>>>
>>>> +static int
>>>> +vfio_pci_core_pm_entry_with_wakeup(struct vfio_device *device, u32 flags,
>>>> +				   void __user *arg, size_t argsz)
>>>
>>> This should be
>>>   struct vfio_device_low_power_entry_with_wakeup __user *arg
>>>
>>
>>  Thanks Jason.
>>
>>  I can update this.
>>
>>  But if we look the existing code, for example
>>  (vfio_ioctl_device_feature_mig_device_state()), then there it still uses
>>  'void __user *arg' only. Is this a new guideline which we need to take
>>  care ?
> 
> I just sent a patch that fixes that too
> 

 Thanks for the update.
 I will change this. 

>>  Do we need to keep the IOCTL name alphabetically sorted in the case list.
>>  Currently, I have added in the order of IOCTL numbers.
> 
> It is generally a good practice to sort lists of things.
> 
> Jason

 Sure. I will make the sorted list.

 Regards,
 Abhishek