From patchwork Wed May 4 15:53:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amelie Delaunay X-Patchwork-Id: 12838116 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 1FEEDC433F5 for ; Wed, 4 May 2022 15:55:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=q8ppJ7pGkCWpj2MEFwnol4dUuyrJFA68LANP432ayJg=; b=1ikgc/dVj9sozI XEYSGoIXbO9ikq9YVBqlLZU5wglM4VIHgl+T1xbLK3OSSmZysn8gimtuEn9lig3AT0N0ngmatIOty 4Ps+0p3PJJEurVGmB2yi+DBQkgRxN0zNcyaI2wUlMYlp8sx1vD5Uhc1YPdh6b+AC8y2LRV2tTTLDk XcmwsL7Pu5BcaexlkEX9w91jnX0JbQ68jnzVmokWMWJD5CAu1+veGtU1kskuO3bhsn7Ao3r77UwDE pBK4yGOy6SUG565XFNLVA/VqCbJGnmiPos5yx4I2a66zhfruAjrXh9qzljB8WeAjMe1m/2FqqAsxh pL05j4YYRzze9llfa+Gw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nmHKa-00BX6p-L5; Wed, 04 May 2022 15:54:24 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nmHK5-00BWoG-Om for linux-arm-kernel@lists.infradead.org; Wed, 04 May 2022 15:53:55 +0000 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 244EghZP001510; Wed, 4 May 2022 17:53:41 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=selector1; bh=mzzwNarX6y/uXSlhjavJ8tl8qTIckcIr1Wld2u6gD7I=; b=Oy5HHofgB19KxswbY1DM0SRBCX3W4aKIrv/JHpB3oCMB+K15LVs8mz/3J03PrPd0wdi8 NXNxtWx176SxFvxUpXn3xTkqm8jeOP9uchRH1UH5Mo0WzJi841GNf7kHGTThJGVj9bDB MwxnanbmY4RB0r9w0EjpI+We+l4laLndbdA4PHnu8WXjgiJK14t7OKZ+Ym7Y/esMzLKY YAMlNc2qrsHDqHT1HefW970F3KiFf9/xyTLshVeTEPNkTGIFhw6CxsOkvjSNicnRqF3C VFV5rz0yjk5tYTjK4L0mILNzj1dcFi5UrQfPXp6fxy0WjK1zzAtvxjQOShOjIk7Br8Mz Fg== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3frv0gecft-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 04 May 2022 17:53:41 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 900D810002A; Wed, 4 May 2022 17:53:40 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag2node2.st.com [10.75.127.5]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 8987D22A6E3; Wed, 4 May 2022 17:53:40 +0200 (CEST) Received: from localhost (10.75.127.47) by SFHDAG2NODE2.st.com (10.75.127.5) with Microsoft SMTP Server (TLS) id 15.0.1497.26; Wed, 4 May 2022 17:53:39 +0200 From: Amelie Delaunay To: Vinod Koul , Maxime Coquelin , Alexandre Torgue CC: , , , , Amelie Delaunay Subject: [PATCH 3/3] dmaengine: stm32-mdma: use dev_dbg on non-busy channel spurious it Date: Wed, 4 May 2022 17:53:22 +0200 Message-ID: <20220504155322.121431-4-amelie.delaunay@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220504155322.121431-1-amelie.delaunay@foss.st.com> References: <20220504155322.121431-1-amelie.delaunay@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.47] X-ClientProxiedBy: SFHDAG2NODE2.st.com (10.75.127.5) To SFHDAG2NODE2.st.com (10.75.127.5) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.858,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-05-04_04,2022-05-04_02,2022-02-23_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220504_085354_119983_990667E3 X-CRM114-Status: GOOD ( 15.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org If interrupt occurs while !chan->busy, it means channel has been disabled between the raise of the interruption and the read of status and ien, so, spurious interrupt can be silently discarded. Signed-off-by: Amelie Delaunay --- drivers/dma/stm32-mdma.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/dma/stm32-mdma.c b/drivers/dma/stm32-mdma.c index a5cbfbbb93d1..caf0cce8f528 100644 --- a/drivers/dma/stm32-mdma.c +++ b/drivers/dma/stm32-mdma.c @@ -1345,9 +1345,12 @@ static irqreturn_t stm32_mdma_irq_handler(int irq, void *devid) if (!(status & ien)) { spin_unlock(&chan->vchan.lock); - dev_warn(chan2dev(chan), - "spurious it (status=0x%04x, ien=0x%04x)\n", - status, ien); + if (chan->busy) + dev_warn(chan2dev(chan), + "spurious it (status=0x%04x, ien=0x%04x)\n", status, ien); + else + dev_dbg(chan2dev(chan), + "spurious it (status=0x%04x, ien=0x%04x)\n", status, ien); return IRQ_NONE; }