From patchwork Wed Nov 20 03:21:40 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 3209471 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 419CA9F3A0 for ; Wed, 20 Nov 2013 05:31:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7A44E206CD for ; Wed, 20 Nov 2013 05:31:20 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) by mail.kernel.org (Postfix) with ESMTP id 91163206C7 for ; Wed, 20 Nov 2013 05:31:19 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [IPv6:::1]) by mail.linuxfoundation.org (Postfix) with ESMTP id B8D4D1120; Wed, 20 Nov 2013 05:29:07 +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 ESMTP id 46C92F92 for ; Wed, 20 Nov 2013 05:28:31 +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 69E731DD5A for ; Wed, 20 Nov 2013 05:28:29 +0000 (UTC) Received: from ayumi.isobedori.kobe.vergenet.net (p2020-ipbfp1604kobeminato.hyogo.ocn.ne.jp [114.154.85.20]) by kirsty.vergenet.net (Postfix) with ESMTP id 8D0AA2673CA; Wed, 20 Nov 2013 14:23:24 +1100 (EST) Received: by ayumi.isobedori.kobe.vergenet.net (Postfix, from userid 7100) id 22CD86CE6B1; Wed, 20 Nov 2013 12:23:23 +0900 (JST) From: Simon Horman To: ltsi-dev@lists.linuxfoundation.org Date: Wed, 20 Nov 2013 12:21:40 +0900 Message-Id: <1384917713-15962-583-git-send-email-horms+renesas@verge.net.au> X-Mailer: git-send-email 1.8.4 In-Reply-To: <1384917713-15962-1-git-send-email-horms+renesas@verge.net.au> References: <1384917713-15962-1-git-send-email-horms+renesas@verge.net.au> X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,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-3.10 582/595] mmc: tmio: postpone controller reset during resume 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: Guennadi Liakhovetski When resuming, the tmio_mmc_host_resume() function is run when the controller might still be powered down. Issuing a reset command to it at that time has no effect. This patch postpones resetting the controller until the first powering-up .set_ios() call. Reported-by: Nguyen Viet Dung Signed-off-by: Guennadi Liakhovetski Signed-off-by: Chris Ball (cherry picked from commit b22ffdcd25d67a07f2b5a75a7805826bfe8597f1) Signed-off-by: Simon Horman --- drivers/mmc/host/tmio_mmc.h | 1 + drivers/mmc/host/tmio_mmc_pio.c | 6 +++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index d857f5c..759d8f4 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -85,6 +85,7 @@ struct tmio_mmc_host { unsigned long last_req_ts; struct mutex ios_lock; /* protect set_ios() context */ bool native_hotplug; + bool resuming; }; int tmio_mmc_host_probe(struct tmio_mmc_host **host, diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index 5a1bc3b..7e644da0 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -862,6 +862,10 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (!host->power) { tmio_mmc_clk_update(mmc); pm_runtime_get_sync(dev); + if (host->resuming) { + tmio_mmc_reset(host); + host->resuming = false; + } } tmio_mmc_set_clock(host, ios->clock); if (!host->power) { @@ -1154,10 +1158,10 @@ int tmio_mmc_host_resume(struct device *dev) struct mmc_host *mmc = dev_get_drvdata(dev); struct tmio_mmc_host *host = mmc_priv(mmc); - tmio_mmc_reset(host); tmio_mmc_enable_dma(host, true); /* The MMC core will perform the complete set up */ + host->resuming = true; return mmc_resume_host(mmc); } EXPORT_SYMBOL(tmio_mmc_host_resume);