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 92915C001DD for ; Mon, 26 Jun 2023 18:41:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232521AbjFZSl6 (ORCPT ); Mon, 26 Jun 2023 14:41:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54500 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232523AbjFZSl5 (ORCPT ); Mon, 26 Jun 2023 14:41:57 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 70540DA for ; Mon, 26 Jun 2023 11:41:56 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0E04960F51 for ; Mon, 26 Jun 2023 18:41:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1A167C433C0; Mon, 26 Jun 2023 18:41:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687804915; bh=CBc4GKNO1MRLJg1eKVWqxkEoP1h79fxST86ixGuqN60=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LnUEJXBZ8rpKwadzEbf7uoIE6QZHuCa4KaCyMCDeZzrW6SoIQ+suYFKWrcU7IXLpt /RvykMvo7Iau3m1eEOSfpX8mg4wN28Etw52QHPHrsSRE17QG2Zg7vjx0yRZ/Ag8N5r LtS8hu2eHJavspprlYJbUhIwFkhhBqOZDUVUgbFw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Clark Wang , Mark Brown , Sasha Levin Subject: [PATCH 5.15 85/96] spi: lpspi: disable lpspi module irq in DMA mode Date: Mon, 26 Jun 2023 20:12:40 +0200 Message-ID: <20230626180750.540139557@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230626180746.943455203@linuxfoundation.org> References: <20230626180746.943455203@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Clark Wang [ Upstream commit 9728fb3ce11729aa8c276825ddf504edeb00611d ] When all bits of IER are set to 0, we still can observe the lpspi irq events when using DMA mode to transfer data. So disable irq to avoid the too much irq events. Signed-off-by: Clark Wang Link: https://lore.kernel.org/r/20230505063557.3962220-1-xiaoning.wang@nxp.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-fsl-lpspi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index 5d98611dd999d..c5ff6e8c45be0 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -906,9 +906,14 @@ static int fsl_lpspi_probe(struct platform_device *pdev) ret = fsl_lpspi_dma_init(&pdev->dev, fsl_lpspi, controller); if (ret == -EPROBE_DEFER) goto out_pm_get; - if (ret < 0) dev_err(&pdev->dev, "dma setup error %d, use pio\n", ret); + else + /* + * disable LPSPI module IRQ when enable DMA mode successfully, + * to prevent the unexpected LPSPI module IRQ events. + */ + disable_irq(irq); ret = devm_spi_register_controller(&pdev->dev, controller); if (ret < 0) { -- 2.39.2