From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@alsa-project.org,
Vaibhav Agarwal <vaibhav.sr@gmail.com>,
Mark Greer <mgreer@animalcreek.com>,
Johan Hovold <johan@kernel.org>, Alex Elder <elder@kernel.org>,
greybus-dev@lists.linaro.org
Subject: Re: [PATCH 07/11] staging: greybus: Avoid abusing controls_rwsem
Date: Tue, 18 Jul 2023 20:00:17 +0200 [thread overview]
Message-ID: <2023071812-craving-droplet-5df7@gregkh> (raw)
In-Reply-To: <20230718141304.1032-8-tiwai@suse.de>
On Tue, Jul 18, 2023 at 04:13:00PM +0200, Takashi Iwai wrote:
> The controls_rwsem of snd_card object is rather an internal lock, and
> not really meant to be used by others for its data protection.
>
> This patch addresses it by replacing the controls_rwsem usages with
> the own (new) mutex.
>
> Note that the up_write() and down_write() calls around
> gbaudio_remove_component_controls() are simply dropped without
> replacement. These temporary up/down were a workaround since
> gbaudio_remove_component_controls() itself took the rwsem. Now it was
> also gone, we can clean up the workaround, too.
>
> Cc: Vaibhav Agarwal <vaibhav.sr@gmail.com>
> Cc: Mark Greer <mgreer@animalcreek.com>
> Cc: Johan Hovold <johan@kernel.org>
> Cc: Alex Elder <elder@kernel.org>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: greybus-dev@lists.linaro.org
> Signed-off-by: Takashi Iwai <tiwai@suse.de>
> ---
> drivers/staging/greybus/audio_codec.c | 18 +++++++-----------
> drivers/staging/greybus/audio_codec.h | 1 +
> 2 files changed, 8 insertions(+), 11 deletions(-)
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
next prev parent reply other threads:[~2023-07-18 18:02 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-18 14:12 [PATCH 00/11] ALSA: Make control API taking controls_rwsem consistently Takashi Iwai
2023-07-18 14:12 ` [PATCH 01/11] ALSA: control: Take card->controls_rwsem in snd_ctl_rename() Takashi Iwai
2023-07-18 14:12 ` [PATCH 02/11] staging: greybus: audio_helper: Use snd_ctl_remove_id() Takashi Iwai
2023-07-18 18:00 ` Greg Kroah-Hartman
2023-07-18 14:12 ` [PATCH 03/11] ASoC: atmel: mchp-pdmc: " Takashi Iwai
2023-07-18 14:45 ` claudiu beznea
2023-07-18 14:59 ` Mark Brown
2023-07-18 14:12 ` [PATCH 04/11] ALSA: control: Take controls_rwsem lock in snd_ctl_remove() Takashi Iwai
2023-07-18 14:12 ` [PATCH 05/11] ALSA: control: Add lockdep warning to internal functions Takashi Iwai
2023-07-18 14:12 ` [PATCH 06/11] ASoC: sigmadsp: Simplify with snd_ctl_activate_id() Takashi Iwai
2023-07-18 14:58 ` Mark Brown
2023-07-18 14:13 ` [PATCH 07/11] staging: greybus: Avoid abusing controls_rwsem Takashi Iwai
2023-07-18 18:00 ` Greg Kroah-Hartman [this message]
2023-07-18 14:13 ` [PATCH 08/11] ALSA: control: Make snd_ctl_find_id() argument const Takashi Iwai
2023-07-18 14:13 ` [PATCH 09/11] ALSA: control: Introduce unlocked version for snd_ctl_find_*() helpers Takashi Iwai
2023-07-18 14:13 ` [PATCH 10/11] ALSA: control: Take lock in snd_ctl_find_id() and snd_ctl_find_numid() Takashi Iwai
2023-07-19 10:20 ` Oswald Buddenhagen
2023-07-19 10:45 ` Takashi Iwai
2023-07-18 14:13 ` [PATCH 11/11] ALSA: emu10k1: Go back and simplify with snd_ctl_find_id() Takashi Iwai
2023-07-20 8:16 ` [PATCH 00/11] ALSA: Make control API taking controls_rwsem consistently Takashi Iwai
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