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Date:   Sat, 2 Sep 2017 23:58:30 +0200
From:   Wolfram Sang <>
To:     Jun Gao <>
Subject: Re: [I2C] About warning 'DMA-API: device driver maps memory from


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,

Kind regards,


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