From patchwork Tue Jul 30 19:53:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Edmund Raile X-Patchwork-Id: 13747844 Received: from mail-4319.protonmail.ch (mail-4319.protonmail.ch [185.70.43.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A0ABA18CBE2; Tue, 30 Jul 2024 19:53:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.70.43.19 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722369221; cv=none; b=GOdTtvffhL4MhujDB5mlXWGuKUr7wEfqt9W7By2ectJ2qav6/7RZsKXh/SVviTVA1MVaTWKpRmo5t4N3gkapWKXjswMgK8nAdxYKUd7ykFRJBTylTaBzufBIyoFXbolEtYbXEt9zsbjv8/YtnBiPjaDTP4RtdVzgGRi5mYOk32I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722369221; c=relaxed/simple; bh=laxSQSPYJctgSCW+XyB1kSgnrGu5ITEkEr9F1N312xY=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=C5s24+eYISVwJrL/PQvYQoN5v0AIUjOYbPlLfLQZoV8zcCkoBXkZ1g5GjXSosHZugTYmusF6Xi0BcC0weoRvWrtlFqk7DmsXk9+moL/6TtV2/Sst3kjFgL0r6xUK/pDiOGTXat/EN7A9lmTYU2myPKjyc69qVN8qDFT2Czw0wuM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=protonmail.com; spf=pass smtp.mailfrom=protonmail.com; dkim=pass (2048-bit key) header.d=protonmail.com header.i=@protonmail.com header.b=MH+0y5Ea; arc=none smtp.client-ip=185.70.43.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=protonmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=protonmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=protonmail.com header.i=@protonmail.com header.b="MH+0y5Ea" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail3; t=1722369211; x=1722628411; bh=cNtL0at+NM76BiXr+/utx4QF6EFB5LzJYBQFroFALf0=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=MH+0y5EanxaBHYZJLP6J2Ql52me09sFDvyqz2WU/dBNS06K7SMDb017B2phQNZmBk 1JAECrQzhEUaYWnql6RT5RyCeXkgyGeQeQuYwHdIdlTJybF2sKI9XXMfa4rzpQdivx 22QtrA/kCApjQZB7ZLLbw8wir1sSi37Sk8rvTApq/Yn/DO/kjkn1QThVg4BbqjSt1J XITg5nY+zcyA9XtnzK2RwuEJ1HhBYJgGQq3kdK4CYE7xM6nnEUsn7AZRZ0caiK2q4m DrlRV8DqGx9C4a1qPSJ2bFk0BTJ+7JDDFjA1jFY5TVlaxraM38KUn/dOvu87eYqo8K bTeARtMihtXrQ== Date: Tue, 30 Jul 2024 19:53:26 +0000 To: o-takashi@sakamocchi.jp, clemens@ladisch.de From: Edmund Raile Cc: tiwai@suse.com, alsa-devel@alsa-project.org, linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH v4 1/2] Revert "ALSA: firewire-lib: obsolete workqueue for period update" Message-ID: <20240730195318.869840-2-edmund.raile@protonmail.com> In-Reply-To: <20240730195318.869840-1-edmund.raile@protonmail.com> References: <20240730195318.869840-1-edmund.raile@protonmail.com> Feedback-ID: 43016623:user:proton X-Pm-Message-ID: 2c567fcb0beaeedff08bb820af32d87b9da7947a Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 prepare resolution of AB/BA deadlock competition for substream lock: restore workqueue previously used for process context: revert commit b5b519965c4c ("ALSA: firewire-lib: obsolete workqueue for period update") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/kwryofzdmjvzkuw6j3clftsxmoolynljztxqwg76hzeo4simnl@jn3eo7pe642q/ Signed-off-by: Edmund Raile --- sound/firewire/amdtp-stream.c | 15 +++++++++++++++ sound/firewire/amdtp-stream.h | 1 + 2 files changed, 16 insertions(+) diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index d35d0a420ee0..31201d506a21 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -77,6 +77,8 @@ // overrun. Actual device can skip more, then this module stops the packet streaming. #define IR_JUMBO_PAYLOAD_MAX_SKIP_CYCLES 5 +static void pcm_period_work(struct work_struct *work); + /** * amdtp_stream_init - initialize an AMDTP stream structure * @s: the AMDTP stream to initialize @@ -105,6 +107,7 @@ int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit, s->flags = flags; s->context = ERR_PTR(-1); mutex_init(&s->mutex); + INIT_WORK(&s->period_work, pcm_period_work); s->packet_index = 0; init_waitqueue_head(&s->ready_wait); @@ -347,6 +350,7 @@ EXPORT_SYMBOL(amdtp_stream_get_max_payload); */ void amdtp_stream_pcm_prepare(struct amdtp_stream *s) { + cancel_work_sync(&s->period_work); s->pcm_buffer_pointer = 0; s->pcm_period_pointer = 0; } @@ -624,6 +628,16 @@ static void update_pcm_pointers(struct amdtp_stream *s, } } +static void pcm_period_work(struct work_struct *work) +{ + struct amdtp_stream *s = container_of(work, struct amdtp_stream, + period_work); + struct snd_pcm_substream *pcm = READ_ONCE(s->pcm); + + if (pcm) + snd_pcm_period_elapsed(pcm); +} + static int queue_packet(struct amdtp_stream *s, struct fw_iso_packet *params, bool sched_irq) { @@ -1910,6 +1924,7 @@ static void amdtp_stream_stop(struct amdtp_stream *s) return; } + cancel_work_sync(&s->period_work); fw_iso_context_stop(s->context); fw_iso_context_destroy(s->context); s->context = ERR_PTR(-1); diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h index a1ed2e80f91a..775db3fc4959 100644 --- a/sound/firewire/amdtp-stream.h +++ b/sound/firewire/amdtp-stream.h @@ -191,5 +191,6 @@ struct amdtp_stream { /* For a PCM substream processing. */ struct snd_pcm_substream *pcm; + struct work_struct period_work; snd_pcm_uframes_t pcm_buffer_pointer; unsigned int pcm_period_pointer;