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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 74292C432C3 for ; Wed, 27 Nov 2019 20:37:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4AC462168B for ; Wed, 27 Nov 2019 20:37:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574887061; bh=awQvIKTfUYWNu69iro6jB5+ZflEGxlK8ruMsEgXoNEc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=1Ga5okLmFgKybpPP5IKcHgygeDPNUTmkuKp6K/pxniq/fI1m3pSOUcVDQCTKHrCjs Eio0qhngWSrzN8OwjxXocHIOaowOf1MVjok2v5u4DktYYyqLVIkdfzp60v4LDEJxcS qElzDoiPWwDW6rs7Jx8oTZyDKk34ZYMdA3xX+PDc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728609AbfK0Uhk (ORCPT ); Wed, 27 Nov 2019 15:37:40 -0500 Received: from mail.kernel.org ([198.145.29.99]:40772 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728607AbfK0Uhj (ORCPT ); Wed, 27 Nov 2019 15:37:39 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A0F5A21569; Wed, 27 Nov 2019 20:37:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574887059; bh=awQvIKTfUYWNu69iro6jB5+ZflEGxlK8ruMsEgXoNEc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NjqK3er893u6MNJHo0doqYwYlwJvMvuRLdocvG97AcaLKSjOxHEeFa1KAEofGBCJj W5KIG4eh6SnEHiPgLHsDm20A0L9xDxEjFDi3AXXZvQ39zMeJdVcOxg9p2smRSZSMEr ac6Yv2oRAu/QCcnkw7hy5ZaE5Ci7SH2PpFgUlGyc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Lechner , Vignesh R , Mark Brown , Sasha Levin Subject: [PATCH 4.4 097/132] spi: omap2-mcspi: Fix DMA and FIFO event trigger size mismatch Date: Wed, 27 Nov 2019 21:31:28 +0100 Message-Id: <20191127203022.521896485@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191127202857.270233486@linuxfoundation.org> References: <20191127202857.270233486@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Vignesh R [ Upstream commit baf8b9f8d260c55a86405f70a384c29cda888476 ] Commit b682cffa3ac6 ("spi: omap2-mcspi: Set FIFO DMA trigger level to word length") broke SPI transfers where bits_per_word != 8. This is because of mimsatch between McSPI FIFO level event trigger size (SPI word length) and DMA request size(word length * maxburst). This leads to data corruption, lockup and errors like: spi1.0: EOW timed out Fix this by setting DMA maxburst size to 1 so that McSPI FIFO level event trigger size matches DMA request size. Fixes: b682cffa3ac6 ("spi: omap2-mcspi: Set FIFO DMA trigger level to word length") Cc: stable@vger.kernel.org Reported-by: David Lechner Tested-by: David Lechner Signed-off-by: Vignesh R Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-omap2-mcspi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 2e35fc735ba6a..79fa237f76c42 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -593,8 +593,8 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer) cfg.dst_addr = cs->phys + OMAP2_MCSPI_TX0; cfg.src_addr_width = width; cfg.dst_addr_width = width; - cfg.src_maxburst = es; - cfg.dst_maxburst = es; + cfg.src_maxburst = 1; + cfg.dst_maxburst = 1; rx = xfer->rx_buf; tx = xfer->tx_buf; -- 2.20.1