From mboxrd@z Thu Jan 1 00:00:00 1970 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 1CEF8CD4F30 for ; Fri, 22 Sep 2023 07:59:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231980AbjIVH7s (ORCPT ); Fri, 22 Sep 2023 03:59:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232011AbjIVH7m (ORCPT ); Fri, 22 Sep 2023 03:59:42 -0400 Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [217.70.183.201]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA1F91A2; Fri, 22 Sep 2023 00:59:35 -0700 (PDT) Received: by mail.gandi.net (Postfix) with ESMTPA id 2CA961BF204; Fri, 22 Sep 2023 07:59:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1695369574; 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=Vsq3fcsRQ92trwLtB4WXIyAHgTZzHeLSP3hrA+1+hQo=; b=brWhaUKDSbig4ktuGNsS484EtfqQIqiYqnqlmpBDR8pHhzg5vuZzE47H35cNElYC3opvFk 8CB1mL3KPOXaJx3FxxUj353hC/AB5aTKANJPoEsmeaNqt5ESz4yyd7hoThwR/zjpA+TR36 eIo8LW5cuwrMfwvpCOvWC5plGSG50LZdEMaIZtlTiyFXrcPhDAs17JRLoDspJpslior/sK /trwa6igM1lh086S7xgWXdTjYSs/riVG90MFdIoyDlHQXawBwYtNdMXRr9h4naRQBmI0wC d9yZre35IRamn5XJc4WIMIAWTxzgNonE4HK6dv9e/X58MkZ0rJnHfVvRH4gjpA== From: Herve Codina 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, Simon Horman , Christophe JAILLET , Thomas Petazzoni Subject: [PATCH v6 03/30] soc: fsl: cpm1: qmc: Fix rx channel reset Date: Fri, 22 Sep 2023 09:58:38 +0200 Message-ID: <20230922075913.422435-4-herve.codina@bootlin.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230922075913.422435-1-herve.codina@bootlin.com> References: <20230922075913.422435-1-herve.codina@bootlin.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-GND-Sasl: herve.codina@bootlin.com Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org 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 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); } -- 2.41.0