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

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Date:   Thu, 25 Aug 2022 16:32:40 -0600
From:   Alex Williamson <alex.williamson@...hat.com>
To:     Abhishek Sahu <abhsahu@...dia.com>
Cc:     Jason Gunthorpe <jgg@...dia.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 Thu, 18 Aug 2022 22:31:03 +0530
Abhishek Sahu <abhsahu@...dia.com> wrote:

> 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.

The series looks good to me, so I'd suggest to rebase on Jason's
patches[1][2] so you can easily sort out the above.  Thanks,

Alex

[1]https://lore.kernel.org/all/0-v1-da6fc51ee22e+562-vfio_pci_priv_jgg@nvidia.com/
[2]https://lore.kernel.org/all/0-v1-11d8272dc65a+4bd-vfio_ioctl_split_jgg@nvidia.com/