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

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@wanadoo.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


WARNING: multiple messages have this Message-ID (diff)
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To: Felix Fietkau <nbd@nbd.name>, John Crispin <john@phrozen.org>,
	Sean Wang <sean.wang@mediatek.com>,
	Mark Lee <Mark-MC.Lee@mediatek.com>,
	Lorenzo Bianconi <lorenzo@kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	AngeloGioacchino Del Regno
	<angelogioacchino.delregno@collabora.com>
Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
	Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
	netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org
Subject: [PATCH net-next] net: ethernet: mtk_wed: No need to clear memory after a dma_alloc_coherent() call
Date: Sun, 12 Feb 2023 07:51:51 +0100	[thread overview]
Message-ID: <d5acce7dd108887832c9719f62c7201b4c83b3fb.1676184599.git.christophe.jaillet@wanadoo.fr> (raw)

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@wanadoo.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


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             reply	other threads:[~2023-02-12  6:52 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-12  6:51 Christophe JAILLET [this message]
2023-02-12  6:51 ` [PATCH net-next] net: ethernet: mtk_wed: No need to clear memory after a dma_alloc_coherent() call Christophe JAILLET
2023-02-14  3:50 ` patchwork-bot+netdevbpf
2023-02-14  3:50   ` patchwork-bot+netdevbpf

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