linux-kernel - Re: [alsa-devel] [PATCH] opl3: Fix a possible sleep-in-atomic bug in snd_opl3_find

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Date:   Mon, 9 Oct 2017 08:32:48 +0200
From:   Clemens Ladisch <clemens@...isch.de>
To:     Jia-Ju Bai <baijiaju1990@....com>
Cc:     perex@...ex.cz, tiwai@...e.com, o-takashi@...amocchi.jp,
        elfring@...rs.sourceforge.net, fabf@...net.be,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH] opl3: Fix a possible sleep-in-atomic bug in
 snd_opl3_find_patch

Jia-Ju Bai wrote:
> The driver may sleep under a spinlock, and the function call path is:
> snd_opl3_note_on (acquire the spinlock)
>   snd_opl3_find_patch
>     kzalloc(GFP_KERNEL) --> may sleep

This call path is not possible because create_patch is not set.


Regards,
Clemens