linux-kernel - [PATCH net-next] net: ethernet: mtk_wed: No need to clear memory after a dma_alloc

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Message-Id: <d5acce7dd108887832c9719f62c7201b4c83b3fb.1676184599.git.christophe.jaillet@wanadoo.fr>
Date:   Sun, 12 Feb 2023 07:51:51 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Felix Fietkau <nbd@....name>, John Crispin <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH net-next] net: ethernet: mtk_wed: No need to clear memory after a dma_alloc_coherent() call

dma_alloc_coherent() already clears the allocated memory, there is no need
to explicitly call memset().

Moreover, it is likely that the size in the memset() is incorrect and
should be "size * sizeof(*ring->desc)".

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/net/ethernet/mediatek/mtk_wed.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c
index 95ac4f71d2b2..95d890870984 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -787,7 +787,6 @@ mtk_wed_rro_ring_alloc(struct mtk_wed_device *dev, struct mtk_wed_ring *ring,
 
 	ring->desc_size = sizeof(*ring->desc);
 	ring->size = size;
-	memset(ring->desc, 0, size);
 
 	return 0;
 }
-- 
2.34.1