Date: Sat, 2 Sep 2017 23:58:30 +0200
From: Wolfram Sang <wsa@the-dreams.de>
To: Jun Gao <jun.gao@mediatek.com>
Cc: srv_heupstream@mediatek.com, linux-i2c@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-mediatek@lists.infradead.org, yingjoe.chen@mediatek.com
Subject: Re: [I2C] About warning 'DMA-API: device driver maps memory from
 stack'
Message-ID: <20170902215829.3jpwmbyy27cpu5rm@ninjato>
References: <1504354088.31793.48.camel@mhfsdcap03>
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Hi,

nice to see someone else interested in the I2C & DMA topic.

Please check this series which I sent out recently:

"[RFC PATCH v4 0/6] i2c: document DMA handling and add helpers for it"

In that series, I proposed...

> 3. kmalloc data buffer instead of local variables buf in function
> i2c_smbus_xfer_emulated(...)

... this solution. Although I have to check Mauro's general response to
the series first. I'd be interested in what you think of the series,
too.

Kind regards,

   Wolfram


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