Re: [PATCH v2 12/17] drivers/firmware/sdei: Remove _sdei_event_register()

[Jonathan Cameron <Jonathan.Cameron@Huawei.com>]

On Wed, 22 Jul 2020 19:57:35 +1000
Gavin Shan <gshan@redhat.com> wrote:

> The function _sdei_event_register() is called by sdei_event_register()
> and sdei_device_thaw() as the following functional call chain shows.
> _sdei_event_register() covers the shared and privte events, but

private

> sdei_device_thaw() only covers the shared events. So the logic to
> cover the private events in _sdei_event_register() isn't needed by
> sdei_device_thaw().
> 
> Similarly, sdei_reregister_event_llocked() covers the shared and
> private events in the regard of reenablement. The logic to cover
> the private events isn't needed by sdei_device_thaw() either.
> 
>    sdei_event_register          sdei_device_thaw
>       _sdei_event_register         sdei_reregister_shared
>                                       sdei_reregister_event_llocked
>                                          _sdei_event_register
> 
> This removes _sdei_event_register() and sdei_reregister_event_llocked().
> Their logic is moved to sdei_event_register() and sdei_reregister_shared().
> This shouldn't cause any logicial changes.
> 
> Signed-off-by: Gavin Shan <gshan@redhat.com>

Otherwise looks good to me.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---
> v2: Improved commit log
>     Drop changes to reorder the variables
> ---
>  drivers/firmware/arm_sdei.c | 77 ++++++++++++++-----------------------
>  1 file changed, 28 insertions(+), 49 deletions(-)
> 
> diff --git a/drivers/firmware/arm_sdei.c b/drivers/firmware/arm_sdei.c
> index da0e0d5591a8..f4cd9791242f 100644
> --- a/drivers/firmware/arm_sdei.c
> +++ b/drivers/firmware/arm_sdei.c
> @@ -575,25 +575,6 @@ static void _local_event_register(void *data)
>  	sdei_cross_call_return(arg, err);
>  }
>  
> -static int _sdei_event_register(struct sdei_event *event)
> -{
> -	int err;
> -
> -	lockdep_assert_held(&sdei_events_lock);
> -
> -	if (event->type == SDEI_EVENT_TYPE_SHARED)
> -		return sdei_api_event_register(event->event_num,
> -					       sdei_entry_point,
> -					       event->registered,
> -					       SDEI_EVENT_REGISTER_RM_ANY, 0);
> -
> -	err = sdei_do_cross_call(_local_event_register, event);
> -	if (err)
> -		sdei_do_cross_call(_local_event_unregister, event);
> -
> -	return err;
> -}
> -
>  int sdei_event_register(u32 event_num, sdei_event_callback *cb, void *arg)
>  {
>  	int err;
> @@ -616,7 +597,17 @@ int sdei_event_register(u32 event_num, sdei_event_callback *cb, void *arg)
>  	}
>  
>  	cpus_read_lock();
> -	err = _sdei_event_register(event);
> +	if (event->type == SDEI_EVENT_TYPE_SHARED) {
> +		err = sdei_api_event_register(event->event_num,
> +					      sdei_entry_point,
> +					      event->registered,
> +					      SDEI_EVENT_REGISTER_RM_ANY, 0);
> +	} else {
> +		err = sdei_do_cross_call(_local_event_register, event);
> +		if (err)
> +			sdei_do_cross_call(_local_event_unregister, event);
> +	}
> +
>  	if (err) {
>  		sdei_event_destroy(event);
>  		pr_warn("Failed to register event %u: %d\n", event_num, err);
> @@ -633,33 +624,6 @@ int sdei_event_register(u32 event_num, sdei_event_callback *cb, void *arg)
>  	return err;
>  }
>  
> -static int sdei_reregister_event_llocked(struct sdei_event *event)
> -{
> -	int err;
> -
> -	lockdep_assert_held(&sdei_events_lock);
> -	lockdep_assert_held(&sdei_list_lock);
> -
> -	err = _sdei_event_register(event);
> -	if (err) {
> -		pr_err("Failed to re-register event %u\n", event->event_num);
> -		sdei_event_destroy_llocked(event);
> -		return err;
> -	}
> -
> -	if (event->reenable) {
> -		if (event->type == SDEI_EVENT_TYPE_SHARED)
> -			err = sdei_api_event_enable(event->event_num);
> -		else
> -			err = sdei_do_cross_call(_local_event_enable, event);
> -	}
> -
> -	if (err)
> -		pr_err("Failed to re-enable event %u\n", event->event_num);
> -
> -	return err;
> -}
> -
>  static int sdei_reregister_shared(void)
>  {
>  	int err = 0;
> @@ -672,9 +636,24 @@ static int sdei_reregister_shared(void)
>  			continue;
>  
>  		if (event->reregister) {
> -			err = sdei_reregister_event_llocked(event);
> -			if (err)
> +			err = sdei_api_event_register(event->event_num,
> +					sdei_entry_point, event->registered,
> +					SDEI_EVENT_REGISTER_RM_ANY, 0);
> +			if (err) {
> +				sdei_event_destroy_llocked(event);
> +				pr_err("Failed to re-register event %u\n",
> +				       event->event_num);
>  				break;
> +			}
> +		}
> +
> +		if (event->reenable) {
> +			err = sdei_api_event_enable(event->event_num);
> +			if (err) {
> +				pr_err("Failed to re-enable event %u\n",
> +				       event->event_num);
> +				break;
> +			}
>  		}
>  	}
>  	spin_unlock(&sdei_list_lock);



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