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 X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E806C433E6 for ; Wed, 3 Mar 2021 05:56:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AFB6764E6C for ; Wed, 3 Mar 2021 05:56:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235324AbhCCFrG (ORCPT ); Wed, 3 Mar 2021 00:47:06 -0500 Received: from mail.kernel.org ([198.145.29.99]:39744 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1448076AbhCBNzG (ORCPT ); Tue, 2 Mar 2021 08:55:06 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9E9C164F86; Tue, 2 Mar 2021 11:58:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1614686283; bh=JxBOvQlb1mV3WHzKwhlOFEdlY0k8MJZTgRuw+0Gkp5U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eqf370pCtxv/9RNoR5hlUuVNvQ5FKwfEZ6AO/RAnkKgilZ2CTtaf6ijKp7EadryFI RIQIJTWovgBxYfWDITQu3wC0t5+DisXN35n1duOuXERvJrMfkaz7PyLf2R6ZT1zjB1 Ya2nj+eQzryYbsHFby8K3hPnchkaq57jeOzk7o7iNCDFc8aXMwibYVtwM92W6us3nO BE62qlUPu2l0j9pX/QwvZxcWM9jslWe0XXbc3WJcw6k8gzbGX65/oRmTAVKJ42LMdk wynrv6UWU7vqvdgMaIXTJlze0V+Q8/lT9bFLstmIDgeuf++XSiZ8DzndeEzUg3swSt lVoHc36bDoQHA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alain Volmat , Mark Brown , Sasha Levin , linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.4 10/33] spi: stm32: make spurious and overrun interrupts visible Date: Tue, 2 Mar 2021 06:57:26 -0500 Message-Id: <20210302115749.62653-10-sashal@kernel.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210302115749.62653-1-sashal@kernel.org> References: <20210302115749.62653-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org From: Alain Volmat [ Upstream commit c64e7efe46b7de21937ef4b3594d9b1fc74f07df ] We do not expect to receive spurious interrupts so rise a warning if it happens. RX overrun is an error condition that signals a corrupted RX stream both in dma and in irq modes. Report the error and abort the transfer in either cases. Signed-off-by: Alain Volmat Link: https://lore.kernel.org/r/1612551572-495-9-git-send-email-alain.volmat@foss.st.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-stm32.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 77ddf23b65d6..c7546683fc80 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -924,8 +924,8 @@ static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id) mask |= STM32H7_SPI_SR_RXP; if (!(sr & mask)) { - dev_dbg(spi->dev, "spurious IT (sr=0x%08x, ier=0x%08x)\n", - sr, ier); + dev_warn(spi->dev, "spurious IT (sr=0x%08x, ier=0x%08x)\n", + sr, ier); spin_unlock_irqrestore(&spi->lock, flags); return IRQ_NONE; } @@ -952,15 +952,8 @@ static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id) } if (sr & STM32H7_SPI_SR_OVR) { - dev_warn(spi->dev, "Overrun: received value discarded\n"); - if (!spi->cur_usedma && (spi->rx_buf && (spi->rx_len > 0))) - stm32h7_spi_read_rxfifo(spi, false); - /* - * If overrun is detected while using DMA, it means that - * something went wrong, so stop the current transfer - */ - if (spi->cur_usedma) - end = true; + dev_err(spi->dev, "Overrun: RX data lost\n"); + end = true; } if (sr & STM32H7_SPI_SR_EOT) { -- 2.30.1