From patchwork Fri Apr 5 12:40:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Flavio Suligoi X-Patchwork-Id: 10887319 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 88C3C1390 for ; Fri, 5 Apr 2019 12:40:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6D4F528B73 for ; Fri, 5 Apr 2019 12:40:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5FDCB28B66; Fri, 5 Apr 2019 12:40:37 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 07A0E28B6A for ; Fri, 5 Apr 2019 12:40:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=cvOD1DvlANOtOKtM8GIgXHH9yP/v0xmxo58/J7Qcjds=; b=hXhRUwwPH5CXUG DzSLhkEC4pz3eB5Jz9PKNeWG2Wx8FP6mbRGsdy2Zsn6J+Qszj06X3EI0jUs7wfH73amACLyXYSVKo PqoUmdzL9uhiGXSwLhKndfLW10yRiTA4YCaIKgIAkc25bnfZSiECh1clOvGshc4oCmjuBLdtCm3FV aasZvhptN0a4r5TzDGXFpQTsiuezKcgUOKg/oSfMgwCZtVveav5+JUK3u3NijNQv2dPIqS6rNqoGo 3Bvm7732X2+IK39hcXGuFYbNm8VBvP2vRdhKuDQ+SxkuOsRiPX1Sbpa8aX7ytLUK3YKFKnGDGNxr4 fwz9XL2V0pOp2JKyc2OA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hCO96-0004O1-4x; Fri, 05 Apr 2019 12:40:36 +0000 Received: from smtp.asem.it ([151.1.184.197]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hCO92-0004My-Gl for linux-arm-kernel@lists.infradead.org; Fri, 05 Apr 2019 12:40:34 +0000 Received: from webmail.asem.it by asem.it (smtp.asem.it) (SecurityGateway 5.5.0) with ESMTP id SG003794723.MSG for ; Fri, 05 Apr 2019 14:40:25 +0200S Received: from ASAS044.asem.intra (172.16.16.44) by ASAS044.asem.intra (172.16.16.44) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1261.35; Fri, 5 Apr 2019 14:40:24 +0200 Received: from flavio-x.asem.intra (172.16.17.208) by ASAS044.asem.intra (172.16.16.44) with Microsoft SMTP Server id 15.1.1261.35 via Frontend Transport; Fri, 5 Apr 2019 14:40:24 +0200 From: Flavio Suligoi To: Daniel Mack , Haojian Zhuang , Robert Jarzmik , Mark Brown Subject: [PATCH 1/1] spi: pxa2xxx: change "no DMA channels..." msg from debug to warning Date: Fri, 5 Apr 2019 14:40:22 +0200 Message-ID: <1554468022-17416-1-git-send-email-f.suligoi@asem.it> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-SGHeloLookup-Result: pass smtp.helo=webmail.asem.it (ip=172.16.16.44) X-SGSPF-Result: none (smtp.asem.it) X-SGOP-RefID: str=0001.0A0B0210.5CA74CB9.000D, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 (_st=1 _vt=0 _iwf=0) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190405_054032_737286_DF8425EA X-CRM114-Status: GOOD ( 12.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Flavio Suligoi , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-spi@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Change the type of the diagnostic message: "no DMA channels available, using PIO" from debug to warning. The lack of an available DMA channel is very important regard the spi-pxa2xx performance. The transfer speed can be reduced more than 50%. So it is very important to warn the user about this, without enabling the full SPI debug with CONFIG_SPI_DEBUG. Moreover, enabling the full SPI debug only to enable this specific debug message, the dmesg buffer fills quickly with a lot of repetitive information during the SPI data transfer. This cause the loss of all the first important messages written during the initialization. Signed-off-by: Flavio Suligoi --- drivers/spi/spi-pxa2xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index 6160fe0..f7068cc 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1696,7 +1696,7 @@ static int pxa2xx_spi_probe(struct platform_device *pdev) if (platform_info->enable_dma) { status = pxa2xx_spi_dma_setup(drv_data); if (status) { - dev_dbg(dev, "no DMA channels available, using PIO\n"); + dev_warn(dev, "no DMA channels available, using PIO\n"); platform_info->enable_dma = false; } else { controller->can_dma = pxa2xx_spi_can_dma;