From patchwork Fri Aug 18 16:38:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 715072 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 15161EE4981 for ; Fri, 18 Aug 2023 17:23:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378944AbjHRRXP (ORCPT ); Fri, 18 Aug 2023 13:23:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45562 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1378955AbjHRRUR (ORCPT ); Fri, 18 Aug 2023 13:20:17 -0400 X-Greylist: delayed 2413 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Fri, 18 Aug 2023 10:20:10 PDT Received: from pegase1.c-s.fr (unknown [90.115.179.12]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 60CBE421E; Fri, 18 Aug 2023 10:20:10 -0700 (PDT) Received: from localhost (mailhub3.si.c-s.fr [192.168.12.233]) by localhost (Postfix) with ESMTP id 4RS6zt2Tnqz9vhy; Fri, 18 Aug 2023 18:40:10 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6Z2mtYfdpXn8; Fri, 18 Aug 2023 18:40:10 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 4RS6zl2NZVz9vhD; Fri, 18 Aug 2023 18:40:03 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 490838B763; Fri, 18 Aug 2023 18:40:03 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id PbjSglRz40z8; Fri, 18 Aug 2023 18:40:03 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (PO17626.IDSI0.si.c-s.fr [172.19.54.29]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 824878B77B; Fri, 18 Aug 2023 18:40:01 +0200 (CEST) Received: from PO20335.IDSI0.si.c-s.fr (localhost [127.0.0.1]) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.16.1) with ESMTPS id 37IGduMT141953 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Fri, 18 Aug 2023 18:39:56 +0200 Received: (from chleroy@localhost) by PO20335.IDSI0.si.c-s.fr (8.17.1/8.17.1/Submit) id 37IGdulx141946; Fri, 18 Aug 2023 18:39:56 +0200 X-Authentication-Warning: PO20335.IDSI0.si.c-s.fr: chleroy set sender to christophe.leroy@csgroup.eu using -f From: Christophe Leroy To: Herve Codina , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lee Jones , Linus Walleij , Qiang Zhao , Li Yang , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , Shengjiu Wang , Xiubo Li , Fabio Estevam , Nicolin Chen , Christophe Leroy , Randy Dunlap Cc: netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, alsa-devel@alsa-project.org, Thomas Petazzoni Subject: [PATCH v4 03/28] soc: fsl: cpm1: qmc: Fix rx channel reset Date: Fri, 18 Aug 2023 18:38:57 +0200 Message-ID: <9abc0780ffd0a9044e6898ba215945d23b654e13.1692376360.git.christophe.leroy@csgroup.eu> X-Mailer: git-send-email 2.41.0 In-Reply-To: References: MIME-Version: 1.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1692376733; l=1148; i=christophe.leroy@csgroup.eu; s=20211009; h=from:subject:message-id; bh=X9kXmBtJCxdri6wIDJc7D4FbiQfqsl2mU0uxDYqz7Xk=; b=vqX5OYOX33oUculF2eTODTe8s/15M/RMXx6M9PfDySyA1I5W2KYOF7tRVyBbWFL7gT1gVm0wT uPilhRKifOJAEzpVTD4vSeXn0iXtChfJW3sft5dyDx4RSvORB4pqfQi X-Developer-Key: i=christophe.leroy@csgroup.eu; a=ed25519; pk=HIzTzUj91asvincQGOFx6+ZF5AoUuP9GdOtQChs7Mm0= Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Herve Codina 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 Signed-off-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 7ad0d77f1740..8dc73cc1a83b 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); }