Re: [PATCH] net: intel: ice: Modernize ice_vsi_free() with scope-based guard(mutex)

[Kohei Enju <kohei@enjuk.jp>]

On 10/14 16:35, Ayush Yaduvanshi wrote:
> Signed-off-by: Ayush Yaduvanshi <ayush37735@gmail.com>

The commit message is missing, and this patch seems to be a clean-up
patch, which is discouraged in
Documentation/process/maintainer-netdev.rst. Also, this document says:
    Use of ``guard()`` is discouraged within any function longer than 20 lines

> ---
>  drivers/net/ethernet/intel/ice/ice_lib.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
> index 9e08db376d3d..c695df442822 100644
> --- a/drivers/net/ethernet/intel/ice/ice_lib.c
> +++ b/drivers/net/ethernet/intel/ice/ice_lib.c
> @@ -457,7 +457,7 @@ void ice_vsi_free(struct ice_vsi *vsi)
>  		return;
>  	}
>  
> -	mutex_lock(&pf->sw_mutex);
> +	guard(mutex)(&pf->sw_mutex);
>  	/* updates the PF for this cleared VSI */
>  
>  	pf->vsi[vsi->idx] = NULL;
> @@ -466,7 +466,6 @@ void ice_vsi_free(struct ice_vsi *vsi)
>  	ice_vsi_free_stats(vsi);
>  	ice_vsi_free_arrays(vsi);
>  	mutex_destroy(&vsi->xdp_state_lock);
> -	mutex_unlock(&pf->sw_mutex);
>  	devm_kfree(dev, vsi);

This also extends the critical section, as devm_kfree() is now called
while holding pf->sw_mutex.

Could you please clarify why this change is necessary?

Thanks,
Kohei

>  }
>  
> -- 
> 2.53.0
>