linux-kernel - Re: [PATCH] dma/pool: eliminate alloc_pages warning in atomic_pool

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Message-ID: <fc388df0-ab34-4a8d-a068-5376a3b7c81f@samsung.com>
Date: Mon, 8 Dec 2025 09:41:51 +0100
From: Marek Szyprowski <m.szyprowski@...sung.com>
To: Dave Kleikamp <dave.kleikamp@...cle.com>, Robin Murphy
	<robin.murphy@....com>
Cc: iommu@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dma/pool: eliminate alloc_pages warning in
 atomic_pool_expand

On 02.12.2025 16:28, Dave Kleikamp wrote:
> atomic_pool_expand iterately tries the allocation while decrementing the
> page order. There is no need to issue a warning if an attempted
> allocation fails.
>
> Signed-off-by: Dave Kleikamp <dave.kleikamp@...cle.com>

Fixes: d7e673ec2c8e ("dma-pool: Only allocate from CMA when in same 
memory zone")

Applied to dma-mapping-fixes branch with typo in commit message fixed.

> ---
>   kernel/dma/pool.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/dma/pool.c b/kernel/dma/pool.c
> index ee45dee33d49..26392badc36b 100644
> --- a/kernel/dma/pool.c
> +++ b/kernel/dma/pool.c
> @@ -93,7 +93,7 @@ static int atomic_pool_expand(struct gen_pool *pool, size_t pool_size,
>   			page = dma_alloc_from_contiguous(NULL, 1 << order,
>   							 order, false);
>   		if (!page)
> -			page = alloc_pages(gfp, order);
> +			page = alloc_pages(gfp | __GFP_NOWARN, order);
>   	} while (!page && order-- > 0);
>   	if (!page)
>   		goto out;

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland