From: "Subhransu S. Prusty" <subhransu.s.prusty@intel.com>
To: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
dharageswari.r@intel.com, vinod.koul@intel.com,
jayachandran.b@intel.com, broonie@kernel.org, jeeja.kp@intel.com
Subject: Re: inconsistent reference counting for snd-soc-skl
Date: Thu, 13 Oct 2016 19:11:06 +0530 [thread overview]
Message-ID: <20161013134102.GA24627@subhransu-desktop> (raw)
In-Reply-To: <120ab1f8-002d-de8e-358e-f3b486dc1012@sakamocchi.jp>
On Thu, Oct 13, 2016 at 10:19:37PM +0900, Takashi Sakamoto wrote:
> Hi,
>
> I find an issue of snd-soc-skl due to inconsistent reference counting.
> See this call graph.
>
> skl_probe()
> ->skl_first_init()
> ->skl_i915_init()
> ->snd_hdac_display_power() (CONFIG_SND_SOC_HDAC_HDMI is enabled)
> ->bus->i915_power_refcount++
> ->all error pathes
> ->skl_free()
> ->snd_hda_i915_exit()
> ->WARN_ON(!bus->i915_power_refcount)
>
> This might be also hit by rmmod(8). I see this bug in kernel 4.8 and
> pre-4.9.
Thanks Takashi for reporting. We will fix this.
Regards,
Subhransu
>
>
> Regards
>
> Takashi Sakamoto
--
next parent reply other threads:[~2016-10-13 13:48 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <120ab1f8-002d-de8e-358e-f3b486dc1012@sakamocchi.jp>
2016-10-13 13:41 ` Subhransu S. Prusty [this message]
2016-10-13 13:54 ` inconsistent reference counting for snd-soc-skl Takashi Sakamoto
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