From nobody Fri Dec 19 16:02:02 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE3D6C07E97 for ; Tue, 28 Nov 2023 14:08:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345638AbjK1OI2 (ORCPT ); Tue, 28 Nov 2023 09:08:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35778 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345576AbjK1OIV (ORCPT ); Tue, 28 Nov 2023 09:08:21 -0500 Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::223]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EBAEAD6D for ; Tue, 28 Nov 2023 06:08:27 -0800 (PST) Received: by mail.gandi.net (Postfix) with ESMTPA id 4563C60013; Tue, 28 Nov 2023 14:08:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1701180506; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=qto69Sz/uzj7vWp+LbsEsH5JgUyWqrsMlRYbgKO+Ta4=; b=Ww25g59sPr1Wg8G2/+eo82WrZ6uxax9bU8yVHybpwtNwfTLCgJLf5wbu3NNaKdloqct4SN JOl71UmaiYH9SqoWEm99UYUjls414OjRBZgwcCCRyxgXM+DgHiE6WiGInOx5WCGdzHXc1F 5JutCdvL8M33BnD43l0Zh8DE7gfb/B2Jp/wei1EUp9HzqSHivwORgT3bCB+K83Yp157Knc IbPzw6Vd0r23914xtvob7oGilQ5CO/WiYAf5X4kE+y7MGAFcDlUHUdbT8gHvAQJfWnlUY7 K2lj3jmvc2L8Tb/VERzqS6pCaUHIe1CiReLbXjwgpUkt/bAlxy1311tX1O4q7g== From: Herve Codina To: Herve Codina , Qiang Zhao , Li Yang , Jakub Kicinski , Shengjiu Wang , Xiubo Li , Fabio Estevam , Nicolin Chen , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , Christophe Leroy Cc: Arnd Bergmann , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org, Thomas Petazzoni Subject: [PATCH 03/17] soc: fsl: cpm1: qmc: Fix rx channel reset Date: Tue, 28 Nov 2023 15:08:02 +0100 Message-ID: <20231128140818.261541-4-herve.codina@bootlin.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231128140818.261541-1-herve.codina@bootlin.com> References: <20231128140818.261541-1-herve.codina@bootlin.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-GND-Sasl: herve.codina@bootlin.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The qmc_chan_reset_rx() set the is_rx_stopped flag. This leads to an inconsistent state in the following sequence. qmc_chan_stop() qmc_chan_reset() Indeed, after the qmc_chan_reset() call, the channel must still be stopped. Only a qmc_chan_start() call can move the channel from stopped state to started state. Fix the issue removing the is_rx_stopped flag setting from qmc_chan_reset() Fixes: 3178d58e0b97 ("soc: fsl: cpm1: Add support for QMC") Signed-off-by: Herve Codina Reviewed-by: Christophe Leroy --- drivers/soc/fsl/qe/qmc.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c index 3f3de1351c96..2312152a44b3 100644 --- a/drivers/soc/fsl/qe/qmc.c +++ b/drivers/soc/fsl/qe/qmc.c @@ -685,7 +685,6 @@ static void qmc_chan_reset_rx(struct qmc_chan *chan) qmc_read16(chan->s_param + QMC_SPE_RBASE)); =20 chan->rx_pending =3D 0; - chan->is_rx_stopped =3D false; =20 spin_unlock_irqrestore(&chan->rx_lock, flags); } --=20 2.42.0