linux-kernel - Re: [PATCH v3 08/10] mfd: mfd-core: Protect against NULL call-back function pointer

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Message-ID: <20191025085219.ki5gvqlycncbeztf@holly.lan>
Date:   Fri, 25 Oct 2019 09:52:19 +0100
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     arnd@...db.de, broonie@...nel.org, linus.walleij@...aro.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        baohua@...nel.org, stephan@...hold.net
Subject: Re: [PATCH v3 08/10] mfd: mfd-core: Protect against NULL call-back
 function pointer

On Thu, Oct 24, 2019 at 05:38:30PM +0100, Lee Jones wrote:
> If a child device calls mfd_cell_{en,dis}able() without an appropriate
> call-back being set, we are likely to encounter a panic.  Avoid this
> by adding suitable checking.
> 
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>

Shouldn't this be earlier in the patch set (to avoid transient
regressions)?


Daniel.