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Subject: Re: [BUG] [Resend] Possible sleep-in-atomic-context bugs involving
 regmap_lock_mutex()
To:     Mark Brown <broonie@kernel.org>
Cc:     gregkh@linuxfoundation.org, rafael@kernel.org,
        David Howells <dhowells@redhat.com>,
        Dan Carpenter <dan.carpenter@oracle.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linus.walleij@linaro.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
References: <9bcef57b-1a5c-cd16-8e44-932ef3be08cb@gmail.com>
 <20180910174104.GD10889@sirena.org.uk>
From:   Jia-Ju Bai <baijiaju1990@gmail.com>
Message-ID: <6a754893-535a-c53e-fb65-2221408e06e3@gmail.com>
Date:   Thu, 13 Sep 2018 11:18:21 +0800
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Thanks for the reply :)

On 2018/9/11 1:41, Mark Brown wrote:
> On Thu, Aug 30, 2018 at 10:34:20AM +0800, Jia-Ju Bai wrote:
>
>> My static tool DSAC reports many sleep-in-atomic-context bugs involving
>> regmap_lock_mutex(), so I wonder whether this function is possible to be
>> executed in atomic context.
> Have you actually analyzed the code paths that are really taken here?
> Static tools really don't cope very well with the pluggable locking in
> regmap.  If there are problems I'd suggest reporting them to the authors
> of the drivers using them, it's not really anything to do with regmap if
> they've messed up their locking.

Okay, I will send the reports to the developers for these drivers.


Best wishes,
Jia-Ju Bai