linux-kernel - Re: [PATCH 2/3] mfd: cros_ec: Use the proper size when looking at the cros_ec

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Message-ID: <CAPnjgZ23fmSBaXSwwUby96C00-RgkH9EG8B=cVLV3fSgq5tVVg@mail.gmail.com>
Date:	Mon, 30 Jun 2014 12:36:24 -0700
From:	Simon Glass <sjg@...omium.org>
To:	Doug Anderson <dianders@...omium.org>
Cc:	Lee Jones <lee.jones@...aro.org>, Wolfram Sang <wsa@...-dreams.de>,
	Mark Brown <broonie@...nel.org>,
	Vincent Palatin <vpalatin@...omium.org>,
	Bill Richardson <wfrichar@...omium.org>,
	Randall Spangler <rspangler@...omium.org>,
	Andreas Färber <afaerber@...e.de>,
	stephan@...khronix.com, Olof Johansson <olof@...om.net>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	lk <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] mfd: cros_ec: Use the proper size when looking at the
 cros_ec_i2c result

On 27 June 2014 12:56, Doug Anderson <dianders@...omium.org> wrote:
> We know how many bytes the EC should be sending us (which is also the
> number of bytes transferred) and also how many bytes the EC actually
> wanted to send to us.  When computing the checksum and copying back
> data let's make sure we take the lesser of the two of those.  We'll
> also complain if the EC tried to send us too many bytes.  The EC
> sending us too few bytes is legit for when we send the EC an invalid
> command.
>
> This is based on similar code in cros_ec_spi.
>
> Signed-off-by: Doug Anderson <dianders@...omium.org>

Reviewed-by: Simon Glass <sjg@...omium.org>
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