From patchwork Thu Aug 28 06:57:14 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 4795001 Return-Path: X-Original-To: patchwork-ltsi-dev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 8F64D9F375 for ; Thu, 28 Aug 2014 07:37:30 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C8D642015A for ; Thu, 28 Aug 2014 07:37:29 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EE34B2011D for ; Thu, 28 Aug 2014 07:37:27 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 59991E9F; Thu, 28 Aug 2014 07:20:52 +0000 (UTC) X-Original-To: ltsi-dev@lists.linuxfoundation.org Delivered-To: ltsi-dev@mail.linuxfoundation.org Received: from smtp2.linuxfoundation.org (smtp2.linux-foundation.org [172.17.192.36]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 73AA5C2E for ; Thu, 28 Aug 2014 07:20:45 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from kirsty.vergenet.net (kirsty.vergenet.net [202.4.237.240]) by smtp2.linuxfoundation.org (Postfix) with ESMTP id 09DEF1DCB3 for ; Thu, 28 Aug 2014 07:20:45 +0000 (UTC) Received: from ayumi.isobedori.kobe.vergenet.net (p4222-ipbfp1605kobeminato.hyogo.ocn.ne.jp [114.154.95.222]) by kirsty.vergenet.net (Postfix) with ESMTP id 72A7D26727A; Thu, 28 Aug 2014 17:08:10 +1000 (EST) Received: by ayumi.isobedori.kobe.vergenet.net (Postfix, from userid 7100) id F0C43EDE8E2; Thu, 28 Aug 2014 16:08:08 +0900 (JST) From: Simon Horman To: ltsi-dev@lists.linuxfoundation.org Date: Thu, 28 Aug 2014 15:57:14 +0900 Message-Id: <1409209620-24487-309-git-send-email-horms+renesas@verge.net.au> X-Mailer: git-send-email 2.0.1 In-Reply-To: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> References: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org Cc: Magnus Damm Subject: [LTSI-dev] [PATCH LTSI-3.14 308/894] spi: sh-msiof: Improve transfer error handling X-BeenThere: ltsi-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "A list to discuss patches, development, and other things related to the LTSI project" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: ltsi-dev-bounces@lists.linuxfoundation.org Errors-To: ltsi-dev-bounces@lists.linuxfoundation.org X-Virus-Scanned: ClamAV using ClamSMTP From: Geert Uytterhoeven - Add a timeout when waiting for the transfer complete interrupt, - If sh_msiof_spi_stop() fails, there's no need to clear IER, as the interrupt handler has already done that, - Propagate transfer failures in sh_msiof_transfer_one(). Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown (cherry picked from commit 75b82e23a4ea20a9e1a48695ff5e01761889dbb3) Signed-off-by: Simon Horman --- drivers/spi/spi-sh-msiof.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 8bfa97e..29dee04 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -575,11 +575,16 @@ static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, ret = sh_msiof_spi_start(p, rx_buf); if (ret) { dev_err(&p->pdev->dev, "failed to start hardware\n"); - goto err; + goto stop_ier; } /* wait for tx fifo to be emptied / rx fifo to be filled */ - wait_for_completion(&p->done); + ret = wait_for_completion_timeout(&p->done, HZ); + if (!ret) { + dev_err(&p->pdev->dev, "PIO timeout\n"); + ret = -ETIMEDOUT; + goto stop_reset; + } /* read rx fifo */ if (rx_buf) @@ -591,12 +596,15 @@ static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, ret = sh_msiof_spi_stop(p, rx_buf); if (ret) { dev_err(&p->pdev->dev, "failed to shut down hardware\n"); - goto err; + return ret; } return words; - err: +stop_reset: + sh_msiof_reset_str(p); + sh_msiof_spi_stop(p, rx_buf); +stop_ier: sh_msiof_write(p, IER, 0); return ret; } @@ -679,7 +687,7 @@ static int sh_msiof_transfer_one(struct spi_master *master, rx_buf, words, bits); if (n < 0) - break; + return n; bytes_done += n * bytes_per_word; words -= n;