From patchwork Fri Sep 22 07:58:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 725397 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AC80C1A719; Fri, 22 Sep 2023 07:59:37 +0000 (UTC) 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> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: herve.codina@bootlin.com X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net 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); }