linux-kernel - Re: [PATCH net-next 2/4] net: spacemit: Add K1 Ethernet MAC

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Message-ID: <20250613063145.62871999@kernel.org>
Date: Fri, 13 Jun 2025 06:31:45 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Vivian Wang <wangruikang@...as.ac.cn>
Cc: Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Yixun Lan
 <dlan@...too.org>, Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt
 <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti
 <alex@...ti.fr>, Richard Cochran <richardcochran@...il.com>, Philipp Zabel
 <p.zabel@...gutronix.de>, Russell King <linux@...linux.org.uk>, Vivian Wang
 <uwu@...m.page>, netdev@...r.kernel.org, devicetree@...r.kernel.org,
 linux-riscv@...ts.infradead.org, spacemit@...ts.linux.dev,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 2/4] net: spacemit: Add K1 Ethernet MAC

On Fri, 13 Jun 2025 10:15:08 +0800 Vivian Wang wrote:
> +	rx_ring->desc_addr = dma_alloc_coherent(&pdev->dev, rx_ring->total_size,
> +						&rx_ring->desc_dma_addr,
> +						GFP_KERNEL);
> +	if (!rx_ring->desc_addr) {
> +		kfree(rx_ring->rx_desc_buf);
> +		return -ENOMEM;
> +	}
> +
> +	memset(rx_ring->desc_addr, 0, rx_ring->total_size);

dma_alloc_coherent() already clears memory.
-- 
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