linux-kernel - Re: [PATCH V2 08/15] coresight: tmc: getting the right read_count on tmc

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Message-ID: <57162D7C.7040003@arm.com>
Date:	Tue, 19 Apr 2016 14:07:08 +0100
From:	Suzuki K Poulose <Suzuki.Poulose@....com>
To:	Mathieu Poirier <mathieu.poirier@...aro.org>,
	linux-arm-kernel@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 08/15] coresight: tmc: getting the right read_count on
 tmc_open()

On 12/04/16 18:54, Mathieu Poirier wrote:
> In function tmc_open(), if tmc_read_prepare() fails variable
> drvdata->read_count is not decremented, causing unwanted
> access to drvdata->buf and very likely, a crash dump.
>
> By moving the incrementation to a place where we know things
> are stable this kind of situation is avoided.
>
> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>

Reviewed-by: Suzuki K Poulose <suzuki.poulose@....com>