From: "Amadeusz Sławiński" <amadeuszx.slawinski@linux.intel.com>
To: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: alsa-devel@alsa-project.org,
Cezary Rojewski <cezary.rojewski@intel.com>,
linux-kernel@vger.kernel.org, Jie Yang <yang.jie@linux.intel.com>,
Liam Girdwood <lgirdwood@gmail.com>,
Takashi Iwai <tiwai@suse.com>, Mark Brown <broonie@kernel.org>
Subject: Re: [alsa-devel] [PATCH 02/14] ALSA: hdac: fix memory release for SST and SOF drivers
Date: Thu, 6 Jun 2019 14:57:44 +0200 [thread overview]
Message-ID: <20190606145744.4ea389db@xxx> (raw)
In-Reply-To: <190f5c09-e6ae-918e-3fcc-d91a72a895da@linux.intel.com>
On Wed, 5 Jun 2019 10:06:47 -0500
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> wrote:
> On 6/5/19 8:45 AM, Amadeusz Sławiński wrote:
> > During the integration of HDaudio support, we changed the way in
> > which we get hdev in snd_hdac_ext_bus_device_init() to use one
> > preallocated with devm_kzalloc(), however it still left kfree(hdev)
> > in snd_hdac_ext_bus_device_exit(). It leads to oopses when trying to
> > rmmod and modprobe. Fix it, by just removing kfree call.
> >
> > SOF also uses some of the snd_hdac_ functions for HDAudio support
> > but allocated the memory with kzalloc. A matching fix is provided
> > separately to align all users of the snd_hdac_ library.
>
> There are stability issues with this change (already shared in a
> separate series) and additional findings reported by Libin so this
> should not be applied for now.
>
Yes, as mentioned in cover letter there is pending discussion, I
provided it for completeness.
> >
> > Fixes: 6298542fa33b ("ALSA: hdac: remove memory allocation from
> > snd_hdac_ext_bus_device_init") Reviewed-by: Takashi Iwai
> > <tiwai@suse.de> Signed-off-by: Amadeusz Sławiński
> > <amadeuszx.slawinski@linux.intel.com> Signed-off-by: Pierre-Louis
> > Bossart <pierre-louis.bossart@linux.intel.com> ---
> > sound/hda/ext/hdac_ext_bus.c | 1 -
> > 1 file changed, 1 deletion(-)
> >
> > diff --git a/sound/hda/ext/hdac_ext_bus.c
> > b/sound/hda/ext/hdac_ext_bus.c index c203af71a099..f33ba58b753c
> > 100644 --- a/sound/hda/ext/hdac_ext_bus.c
> > +++ b/sound/hda/ext/hdac_ext_bus.c
> > @@ -170,7 +170,6 @@ EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init);
> > void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev)
> > {
> > snd_hdac_device_exit(hdev);
> > - kfree(hdev);
> > }
> > EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_exit);
> >
> >
>
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
next prev parent reply other threads:[~2019-06-06 12:54 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-05 13:45 [PATCH 00/14] Fix driver reload issues Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 01/14] ASoC: Intel: Skylake: Initialize lists before access so they are safe to use Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 02/14] ALSA: hdac: fix memory release for SST and SOF drivers Amadeusz Sławiński
2019-06-05 15:06 ` Pierre-Louis Bossart
2019-06-06 12:57 ` Amadeusz Sławiński [this message]
2019-06-05 13:45 ` [PATCH 03/14] ALSA: hdac: Fix codec name after machine driver is unloaded and reloaded Amadeusz Sławiński
2019-06-05 15:13 ` [alsa-devel] " Pierre-Louis Bossart
2019-06-05 13:45 ` [PATCH 04/14] ASoC: compress: Fix memory leak from snd_soc_new_compress Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 05/14] ASoC: Intel: Skylake: Don't return failure on machine driver reload Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 06/14] ASoC: Intel: Skylake: Remove static table index when parsing topology Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 07/14] ASoC: Intel: Skylake: Add function to cleanup debugfs interface Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 08/14] ASoC: Intel: Skylake: Properly cleanup on component removal Amadeusz Sławiński
2019-06-10 7:17 ` Cezary Rojewski
2019-06-10 8:23 ` [alsa-devel] " Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 09/14] ASoC: Intel: Skylake: Fix NULL ptr dereference when unloading clk dev Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 10/14] SoC: rt274: Fix internal jack assignment in set_jack callback Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 11/14] ASoC: core: Tell codec that jack is being removed Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 12/14] ASoC: Intel: hdac_hdmi: Set ops to NULL on remove Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 13/14] ASoC: topology: Consolidate how dtexts and dvalues are freed Amadeusz Sławiński
2019-06-05 13:45 ` [PATCH 14/14] ASoC: topology: Consolidate and fix asoc_tplg_dapm_widget_*_create flow Amadeusz Sławiński
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