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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 6C2C5CD98F3 for ; Wed, 11 Oct 2023 06:18:22 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=bootlin.com header.i=@bootlin.com header.a=rsa-sha256 header.s=gm1 header.b=objvKH9J; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4S52dT0k1Jz3vmG for ; Wed, 11 Oct 2023 17:18:21 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=bootlin.com header.i=@bootlin.com header.a=rsa-sha256 header.s=gm1 header.b=objvKH9J; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=bootlin.com (client-ip=2001:4b98:dc4:8::224; helo=relay4-d.mail.gandi.net; envelope-from=herve.codina@bootlin.com; receiver=lists.ozlabs.org) Received: from relay4-d.mail.gandi.net (relay4-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::224]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4S52Yd4K6Rz3cPh for ; Wed, 11 Oct 2023 17:15:01 +1100 (AEDT) Received: by mail.gandi.net (Postfix) with ESMTPA id BFAC0E0008; Wed, 11 Oct 2023 06:14:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1697004898; 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=objvKH9JAKfLcBpFR1A6qzh+qMI3YqOrhpp3QyRrlt5oAWvEzKQ1Fwz3mKqUHHGlGbnOJH Xmw1fUSBf06Qbx7xUYwRmmDkM1xbBEmEdGWtzvscJ5jo1RnChgVmEdA0D0+OWuyt+S7+l5 I9NsmEaJIqQV68GPA22255N+7A0hqr5oEPRDxCpkQrWoSDJEJxW0ACHqBFX/5UF80JA6KH QhqFQ59yI1nMHEcauyq/bJInHL4U/DFTFXMCaFjLAdAUj+NOv4jfR+1e0kaD5Swb+S/WlS VJmqeY4nwH/DUP741qPhMd9j9LgQrbNyAX2jJjQsd8Rdhnvtg7nkiSxvnJ0qCA== 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 Subject: [PATCH v8 03/30] soc: fsl: cpm1: qmc: Fix rx channel reset Date: Wed, 11 Oct 2023 08:14:07 +0200 Message-ID: <20231011061437.64213-4-herve.codina@bootlin.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231011061437.64213-1-herve.codina@bootlin.com> References: <20231011061437.64213-1-herve.codina@bootlin.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-GND-Sasl: herve.codina@bootlin.com X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, Thomas Petazzoni , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, Christophe JAILLET , Simon Horman , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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