From: Christoph Hellwig <hch@infradead.org>
To: Damien Le Moal <dlemoal@kernel.org>
Cc: Yihang Li <liyihang9@huawei.com>,
Christoph Hellwig <hch@infradead.org>,
John Garry <john.g.garry@oracle.com>,
yanaijie@huawei.com, jejb@linux.ibm.com,
martin.petersen@oracle.com, chenxiang66@hisilicon.com,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
linuxarm@huawei.com, prime.zeng@huawei.com,
yangxingui@huawei.com
Subject: Re: [PATCH v2] scsi: libsas: Allocation SMP request is aligned to ARCH_DMA_MINALIGN
Date: Thu, 28 Mar 2024 00:29:16 -0700 [thread overview]
Message-ID: <ZgUcTLQnoLuqhOxO@infradead.org> (raw)
In-Reply-To: <03ed6449-eb57-4a55-b2bf-ecbb9787feca@kernel.org>
On Thu, Mar 28, 2024 at 04:23:22PM +0900, Damien Le Moal wrote:
> But I thought that the original issue was that some arch have ARCH_DMA_MINALIGN
> down to 8B but hisi driver needs at least 16 ?
>
> So in the end, you need something like:
>
> size = ALIGN(size, max(16, ARCH_DMA_MINALIGN));
>
> no ?
I don't think we ever have an 8 byte dma minalign. With 8-byte
aligned addresses dma_mapping_error could run into problems.
next prev parent reply other threads:[~2024-03-28 7:29 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-26 12:43 [PATCH v2] scsi: libsas: Allocation SMP request is aligned to ARCH_DMA_MINALIGN Yihang Li
2024-03-26 13:14 ` Damien Le Moal
2024-03-26 13:32 ` John Garry
2024-03-26 13:40 ` Damien Le Moal
2024-03-28 6:35 ` Christoph Hellwig
2024-03-28 6:59 ` Yihang Li
2024-03-28 7:23 ` Damien Le Moal
2024-03-28 7:29 ` Christoph Hellwig [this message]
2024-03-28 7:36 ` Damien Le Moal
2024-03-28 7:45 ` Christoph Hellwig
2024-03-28 8:00 ` Yihang Li
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