linux-kernel - Re: [PATCH] i2c: at91: use dma safe buffers

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Message-ID: <5673a4be5ac51d19529366c48afceb8c@walle.cc>
Date:   Mon, 28 Mar 2022 09:35:30 +0200
From:   Michael Walle <michael@...le.cc>
To:     Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>
Cc:     linux-i2c@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] i2c: at91: use dma safe buffers

Hi all,

Am 2022-03-03 17:17, schrieb Michael Walle:
> The supplied buffer might be on the stack and we get the following 
> error
> message:
> [    3.312058] at91_i2c e0070600.i2c: rejecting DMA map of vmalloc 
> memory
> 
> Use i2c_{get,put}_dma_safe_msg_buf() to get a DMA-able memory region if
> necessary.
> 
> Cc: stable@...r.kernel.org
> Signed-off-by: Michael Walle <michael@...le.cc>

Any news here?

> ---
> 
> I'm not sure if or which Fixes: tag I should add to this patch. The 
> issue
> seems to be since a very long time, but nobody seem to have triggered 
> it.
> FWIW, I'm using the sff,sfp driver, which triggers this.

-michael