Re: [PATCH v1 0/3] char: use generic power management

[Vaibhav Gupta]

On Fri, Jul 17, 2020 at 01:19:34PM +0530, Vaibhav Gupta wrote:
> Linux Kernel Mentee: Remove Legacy Power Management.
> 
> The purpose of this patch series is to upgrade power management in char
> drivers. This has been done by upgrading .suspend() and .resume() callbacks.
> 
> The upgrade makes sure that the involvement of PCI Core does not change the
> order of operations executed in a driver. Thus, does not change its behavior.
> 
> In general, drivers with legacy PM, .suspend() and .resume() make use of PCI
> helper functions like pci_enable/disable_device_mem(), pci_set_power_state(),
> pci_save/restore_state(), pci_enable/disable_device(), etc. to complete
> their job.
> 
> The conversion requires the removal of those function calls, change the
> callbacks' definition accordingly and make use of dev_pm_ops structure.
> 
> All patches are compile-tested only.
> 
> Test tools:
>     - Compiler: gcc (GCC) 10.1.0
>     - allmodconfig build: make -j$(nproc) W=1 all
> 
> Vaibhav Gupta (3):
>   amd64-agp: use generic power management
>   sis-agp: use generic power management
>   via-agp: use generic power management
> 
>  drivers/char/agp/amd64-agp.c | 24 ++++++------------------
>  drivers/char/agp/sis-agp.c   | 25 ++++++-------------------
>  drivers/char/agp/via-agp.c   | 25 +++++--------------------
>  3 files changed, 17 insertions(+), 57 deletions(-)
> 
> -- 
> 2.27.0
>