netdev - Re: [PATCH net-next v9 2/5] eea: introduce ring and descriptor structures

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Message-ID: <20251103182443.54a12faf@kernel.org>
Date: Mon, 3 Nov 2025 18:24:43 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew+netdev@...n.ch>, "David S.
 Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo
 Abeni <pabeni@...hat.com>, Wen Gu <guwen@...ux.alibaba.com>, Philo Lu
 <lulie@...ux.alibaba.com>, Lorenzo Bianconi <lorenzo@...nel.org>, Vadim
 Fedorenko <vadim.fedorenko@...ux.dev>, Lukas Bulwahn
 <lukas.bulwahn@...hat.com>, Geert Uytterhoeven <geert+renesas@...der.be>,
 Vivian Wang <wangruikang@...as.ac.cn>, Troy Mitchell
 <troy.mitchell@...ux.spacemit.com>, Dust Li <dust.li@...ux.alibaba.com>
Subject: Re: [PATCH net-next v9 2/5] eea: introduce ring and descriptor
 structures

On Wed, 29 Oct 2025 16:01:42 +0800 Xuan Zhuo wrote:
> +static void *ering_alloc_queue(struct eea_device *edev, size_t size,
> +			       dma_addr_t *dma_handle)
> +{
> +	gfp_t flags = GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO;
> +
> +	return dma_alloc_coherent(edev->dma_dev, size, dma_handle, flags);

dma_alloc_coherent() always zeros allocated memory you can drop the __GFP_ZERO.