linux-kernel - Re: [PATCH] regmap: maple: Clear async flag when doing a maple tree cache sync

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Message-ID: <563cf3d2-08bd-4768-950a-02e89fa6b6c8@sirena.org.uk>
Date:   Tue, 18 Jul 2023 18:18:10 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Charles Keepax <ckeepax@...nsource.cirrus.com>
Cc:     gregkh@...uxfoundation.org, rafael@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] regmap: maple: Clear async flag when doing a maple tree
 cache sync

On Tue, Jul 18, 2023 at 06:13:46PM +0100, Charles Keepax wrote:
> The normal regcache_sync function sets the async flag on the register
> map. The maple tree sync code uses a temporary buffer, which is freed
> after the register is written, however, as the async flag is set the
> buffer might not be used until after it is freed. Fix this by clearing
> the async flag in the maple tree sync function.

It would be better to push this down into the rbtree code which is what
really wants this.

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