linux-kernel - Re: [PATCH][next] mt76: Remove redundant assignment to variable tidno

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Date: Wed, 7 Feb 2024 16:00:52 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Colin Ian King <colin.i.king@...il.com>, Felix Fietkau <nbd@....name>,
 Lorenzo Bianconi <lorenzo@...nel.org>, Ryder Lee <ryder.lee@...iatek.com>,
 Shayne Chen <shayne.chen@...iatek.com>, Sean Wang <sean.wang@...iatek.com>,
 Kalle Valo <kvalo@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>,
 linux-wireless@...r.kernel.org, linux-mediatek@...ts.infradead.org
Cc: kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH][next] mt76: Remove redundant assignment to variable tidno

Il 07/02/24 14:11, Colin Ian King ha scritto:
> The variable tidno is being assigned a value that is not being read
> and is being re-assigned a new value a few statements later.
> The assignment is redundant and can be removed.
> 
> Cleans up clang scan warning:
> drivers/net/wireless/mediatek/mt76/agg-rx.c:125:5: warning: Value stored
> to 'tidno' during its initialization is never read [deadcode.DeadStores]
> 
> Signed-off-by: Colin Ian King <colin.i.king@...il.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

> ---
>   drivers/net/wireless/mediatek/mt76/agg-rx.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/mediatek/mt76/agg-rx.c b/drivers/net/wireless/mediatek/mt76/agg-rx.c
> index 10cbd9e560e7..07c386c7b4d0 100644
> --- a/drivers/net/wireless/mediatek/mt76/agg-rx.c
> +++ b/drivers/net/wireless/mediatek/mt76/agg-rx.c
> @@ -122,7 +122,7 @@ mt76_rx_aggr_check_ctl(struct sk_buff *skb, struct sk_buff_head *frames)
>   	struct ieee80211_bar *bar = mt76_skb_get_hdr(skb);
>   	struct mt76_wcid *wcid = status->wcid;
>   	struct mt76_rx_tid *tid;
> -	u8 tidno = status->qos_ctl & IEEE80211_QOS_CTL_TID_MASK;
> +	u8 tidno;
>   	u16 seqno;
>   
>   	if (!ieee80211_is_ctl(bar->frame_control))