linux-kernel - Re: [PATCH] regmap: regcache-rbtree: Fix present bitmap resize

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Message-ID: <CAEnQRZDnzxZtU692_u9ZTHFE2xSoawF+q+D9W74cdTBv8ZdMtw@mail.gmail.com>
Date:	Sat, 7 Mar 2015 19:36:02 +0200
From:	Daniel Baluta <daniel.baluta@...il.com>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Mark Brown <broonie@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] regmap: regcache-rbtree: Fix present bitmap resize

On Sat, Mar 7, 2015 at 6:10 PM, Lars-Peter Clausen <lars@...afoo.de> wrote:
> When inserting a new register into a block at the lower end the present
> bitmap is currently shifted into the wrong direction. The effect of this is
> that the bitmap becomes corrupted and registers which are present might be
> reported as not present and vice versa.
>
> Fix this by shifting left rather than right.
>
> Fixes: 472fdec7380c("regmap: rbtree: Reduce number of nodes, take 2")
> Reported-by: Daniel Baluta <daniel.baluta@...il.com>
> Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>

Thanks Lars! I confirm that this fixes the problem :).

Daniel.
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