From: Pavel Machek <pavel@ucw.cz>
To: Dan Carpenter <dan.carpenter@oracle.com>,
simon.guinot@sequanux.org, kabel@kernel.org
Cc: linux-leds@vger.kernel.org, j.anaszewski@samsung.com
Subject: Re: [bug report] leds: ns2: Remove work queue
Date: Wed, 15 Dec 2021 21:39:55 +0100 [thread overview]
Message-ID: <20211215203955.GG28336@duo.ucw.cz> (raw)
In-Reply-To: <20211210135249.GA16777@kili>
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Hi!
> Hello LED devs,
>
> The patch c29e650b3af2: "leds: ns2: Remove work queue" from Nov 20,
> 2015, leads to the following Smatch static checker warning:
>
> drivers/leds/leds-ns2.c:96 ns2_led_set_mode()
> warn: sleeping in atomic context
Yup, this looks wrong.
Plus, the code is quite crazy.
Not sure what the write_lock in that function is supposed to protect
against. Perhaps it can be just removed?
Hmm. led_set_mode uses custom interface for hardware accelerated
LED. Ideally there's more fixing to be done there :-(.
Best regards,
Pavel
--
http://www.livejournal.com/~pavelmachek
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next prev parent reply other threads:[~2021-12-15 20:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-10 13:52 [bug report] leds: ns2: Remove work queue Dan Carpenter
2021-12-15 20:39 ` Pavel Machek [this message]
2021-12-15 21:04 ` Marek Behún
2021-12-16 10:30 ` Simon Guinot
2021-12-20 17:00 ` Ian Pilcher
2021-12-16 10:28 ` Simon Guinot
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