linux-kernel - Re: [PATCH 0/4] HID: fix few non-DMA capable HID transfers

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Date:   Wed, 23 Nov 2016 17:44:13 +0100 (CET)
From:   Jiri Kosina <jikos@...nel.org>
To:     Benjamin Tissoires <benjamin.tissoires@...hat.com>
cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] HID: fix few non-DMA capable HID transfers

On Mon, 21 Nov 2016, Benjamin Tissoires wrote:

> While playing a little bit with the CP2112 (for hid-rmi I must confess), I
> realized that kernel v4.9 now enforces DMA capable buffers when calling
> hid_hw_raw_request(). Kernel v4.8 works fine (but gives a stacktrace the first
> time), but v4.9 doesn't.
> 
> So I gave a check of all the other drivers in the HID tree, and it looks like
> only 4 drivers are not properly allocating their buffers.
> 
> I'd say this is v4.9 material but I was not able to test magicmouse and lg.
> If this doesn't qualifies for 4.9-rc7, I think we should add the stable@ stamp,
> given that the chance this will break hid-rmi is huge (cp2112 is not so much an
> issue, given it's a devel board).

Thanks for fixing this up. Applied to for-4.9/upstream-fixes.

-- 
Jiri Kosina
SUSE Labs