From patchwork Tue Nov 28 14:08:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 747840 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 alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3E9A1C07CA9 for ; Tue, 28 Nov 2023 14:10:13 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id DDF94E12; Tue, 28 Nov 2023 15:10:00 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz DDF94E12 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1701180610; bh=9b4RzKHoWaXQnuhvnLd2PAgtnIzU07NjAQDPuqpwcYE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Archive:List-Help:List-Owner:List-Post:List-Subscribe: List-Unsubscribe:From; b=CvJ3z9dD+2b/2aEMVqtz5e5VP5BPNFd2IE3VbCi/BDoWTMSsjxss+J38f8ZPO5EhJ SfJYNqk0z65e+d42HI4AZqF8mp6/VcWpJ8GySDZDk2cKPL54JvU81MVCG1U1Q0WVvG t7w3Lmry3PNNzhFXwL98whCz+97myujllx0VjXLQ= Received: by alsa1.perex.cz (Postfix, from userid 50401) id 78950F8063C; Tue, 28 Nov 2023 15:08:47 +0100 (CET) Received: from mailman-core.alsa-project.org (mailman-core.alsa-project.org [10.254.200.10]) by alsa1.perex.cz (Postfix) with ESMTP id 8F935F80639; Tue, 28 Nov 2023 15:08:47 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id C7279F805F5; Tue, 28 Nov 2023 15:08:42 +0100 (CET) Received: from relay3-d.mail.gandi.net (relay3-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::223]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 61913F801D5 for ; Tue, 28 Nov 2023 15:08:27 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 61913F801D5 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key, unprotected) header.d=bootlin.com header.i=@bootlin.com header.a=rsa-sha256 header.s=gm1 header.b=Ww25g59s 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 X-GND-Sasl: herve.codina@bootlin.com Message-ID-Hash: CGTLSTG7R2B3C7U2WPDDISB6D6U7FQNR X-Message-ID-Hash: CGTLSTG7R2B3C7U2WPDDISB6D6U7FQNR X-MailFrom: herve.codina@bootlin.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.9 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: 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)); chan->rx_pending = 0; - chan->is_rx_stopped = false; spin_unlock_irqrestore(&chan->rx_lock, flags); }