linux-kernel - Re: [PATCH v5] wfx: use container

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Date:   Wed, 04 May 2022 09:21:21 +0200
From:   Jérôme Pouiller <jerome.pouiller@...abs.com>
To:     Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev,
        outreachy@...ts.linux.dev, Jaehee Park <jhpark1013@...il.com>,
        Stefano Brivio <sbrivio@...hat.com>,
        Jaehee Park <jhpark1013@...il.com>
Subject: Re: [PATCH v5] wfx: use container_of() to get vif

On Tuesday 3 May 2022 20:21:46 CEST Jaehee Park wrote:
> Currently, upon virtual interface creation, wfx_add_interface() stores
> a reference to the corresponding struct ieee80211_vif in private data,
> for later usage. This is not needed when using the container_of
> construct. This construct already has all the info it needs to retrieve
> the reference to the corresponding struct from the offset that is
> already available, inherent in container_of(), between its type and
> member inputs (struct ieee80211_vif and drv_priv, respectively).
> Remove vif (which was previously storing the reference to the struct
> ieee80211_vif) from the struct wfx_vif, define a function
> wvif_to_vif(wvif) for container_of(), and replace all wvif->vif with
> the newly defined container_of construct.
> 
> Signed-off-by: Jaehee Park <jhpark1013@...il.com>
> ---
> v2
> - Sequenced the wfx.h file (with the new defines) to show up first on
> the diff, which makes the ordering of the diff more logical.
> 
> v3
> - Made edits to the commit message.
> - Shortened the macro name from wvif_to_vif to to_vif.
> - For functions that had more than one instance of vif, defined one
> reference vif at the beginning of the function and used that instead.
> - Broke the if-statements that ran long into two lines.
> 
> v4
> - Changed macro into function and named it back to wvif_to_vif
> - Fit all lines in patch to 80 columns
> - Decared a reference to vif at the beginning of all the functions
> where it's being used
> 
> v5
> - Placed longest declarations first
> 
> 
>  drivers/net/wireless/silabs/wfx/wfx.h     |  6 +-
>  drivers/net/wireless/silabs/wfx/data_rx.c |  5 +-
>  drivers/net/wireless/silabs/wfx/data_tx.c |  3 +-
>  drivers/net/wireless/silabs/wfx/key.c     |  4 +-
>  drivers/net/wireless/silabs/wfx/queue.c   |  3 +-
>  drivers/net/wireless/silabs/wfx/scan.c    | 11 ++--
>  drivers/net/wireless/silabs/wfx/sta.c     | 71 ++++++++++++++---------
>  7 files changed, 65 insertions(+), 38 deletions(-)
> 
[...]
> diff --git a/drivers/net/wireless/silabs/wfx/sta.c b/drivers/net/wireless/silabs/wfx/sta.c
> index 3297d73c327a..040d1f9fb03a 100644
> --- a/drivers/net/wireless/silabs/wfx/sta.c
> +++ b/drivers/net/wireless/silabs/wfx/sta.c
> @@ -101,6 +101,7 @@ void wfx_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
>         struct wfx_vif *wvif = NULL;
>         struct wfx_dev *wdev = hw->priv;
>         bool filter_bssid, filter_prbreq, filter_beacon;
> +       struct ieee80211_vif *vif = wvif_to_vif(wvif);

wvif is modified later in the function, so this one is not correct.


-- 
Jérôme Pouiller