From: Frank Li <Frank.li@oss.nxp.com>
To: Baoquan He <hebaoquan@kylinos.cn>
Cc: linux-mm@kvack.org, akpm@linux-foundation.org, hch@lst.de,
harry@kernel.org, imx@lists.linux.dev
Subject: Re: [PATCH 10/13] media: imx7-media-csi: Don't use GFP_DMA when calling dma_alloc_coherent()
Date: Fri, 4 Sep 2026 10:14:44 -0500 [thread overview]
Message-ID: <aprgZFqkAOfkTL-d@SMW015318> (raw)
In-Reply-To: <20260903111836.1777265-11-hebaoquan@kylinos.cn>
On Thu, Sep 03, 2026 at 07:18:33PM +0800, Baoquan He wrote:
> [You don't often get email from hebaoquan@kylinos.cn. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ]
>
> dma_alloc_coherent() allocates the DMA buffer with the device's
> addressing limitation in mind; the DMA core picks the zone from the
> device's coherent DMA mask and ignores GFP_DMA passed by the caller.
> Remove the redundant GFP_DMA flag.
>
> Cc: imx@lists.linux.dev
> Signed-off-by: Baoquan He <hebaoquan@kylinos.cn>
> ---
Reviewed-by: Frank Li <Frank.Li@nxp.com>
> drivers/media/platform/nxp/imx7-media-csi.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/nxp/imx7-media-csi.c b/drivers/media/platform/nxp/imx7-media-csi.c
> index 7ddc7ba06e3d..22c0cbdc92bf 100644
> --- a/drivers/media/platform/nxp/imx7-media-csi.c
> +++ b/drivers/media/platform/nxp/imx7-media-csi.c
> @@ -466,7 +466,7 @@ static int imx7_csi_alloc_dma_buf(struct imx7_csi *csi,
>
> buf->len = PAGE_ALIGN(size);
> buf->virt = dma_alloc_coherent(csi->dev, buf->len, &buf->dma_addr,
> - GFP_DMA | GFP_KERNEL);
> + GFP_KERNEL);
> if (!buf->virt)
> return -ENOMEM;
>
> --
> 2.54.0
>
>
next prev parent reply other threads:[~2026-09-04 15:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20260903111836.1777265-1-hebaoquan@kylinos.cn>
2026-09-03 11:18 ` [PATCH 10/13] media: imx7-media-csi: Don't use GFP_DMA when calling dma_alloc_coherent() Baoquan He
2026-09-03 11:36 ` sashiko-bot
2026-09-04 15:14 ` Frank Li [this message]
2026-09-03 11:18 ` [PATCH 11/13] media: nxp: imx8-isi: " Baoquan He
2026-09-03 11:37 ` sashiko-bot
2026-09-04 15:14 ` Frank Li
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