linux-kernel - Re: [PATCHv2] i2c: i2c-tiny-usb: fix buffer not being DMA capable

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Date:   Mon, 22 May 2017 10:35:25 +0200
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Sebastian Reichel <sebastian.reichel@...labora.co.uk>
Cc:     Sebastian Reichel <sre@...nel.org>,
        Till Harbaum <till@...baum.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCHv2] i2c: i2c-tiny-usb: fix buffer not being DMA capable

On Fri, May 05, 2017 at 11:06:50AM +0200, Sebastian Reichel wrote:
> Since v4.9 i2c-tiny-usb generates the below call trace
> and longer works, since it can't communicate with the
> USB device. The reason is, that since v4.9 the USB
> stack checks, that the buffer it should transfer is DMA
> capable. This was a requirement since v2.2 days, but it
> usually worked nevertheless.
> 

Applied to for-current, thanks!


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