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 017A0C2D0F3 for ; Wed, 1 Apr 2020 16:55:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C2EE920714 for ; Wed, 1 Apr 2020 16:55:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585760136; bh=tyQhYD7L0c6Qy7Pp19sm+Wi3FjaWbpivNpHwnNv5eh0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EgToyHIhCMVjudcpfaRsW6/8lcceMhsDsMhtmGRs2ofnL0IKsx8PDY1QXOc5CTD/5 9KRcIqUgVmn/RRC6wCYfhPJIn6+oukE/kqcrrKol2MItfbtqc0RpYHGrBmRWTfy8iZ X+orVDIhMOB/hGJYmB5TH+mZiESWUZAglILbwlPU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733022AbgDAQYM (ORCPT ); Wed, 1 Apr 2020 12:24:12 -0400 Received: from mail.kernel.org ([198.145.29.99]:47662 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387419AbgDAQYJ (ORCPT ); Wed, 1 Apr 2020 12:24:09 -0400 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 0F0352137B; Wed, 1 Apr 2020 16:24:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585758248; bh=tyQhYD7L0c6Qy7Pp19sm+Wi3FjaWbpivNpHwnNv5eh0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zTVlwjZgF8qSicWSZniHXqYLpS+CckZhibWMPqo/LEc8TO4Ch9R/+Bb9M5ChQDtDI ta615UC5LUo2Y61jDS5TNGUS+yFaFk/TxHVVWkTrZ9F90KJw/Tsvd4FYMT5IQdc+wQ D18VtELhbxcYhLerPMeo35YURIo43Grk48pXNMUM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sowjanya Komatineni , Ulf Hansson , Sasha Levin Subject: [PATCH 4.19 003/116] mmc: core: Respect MMC_CAP_NEED_RSP_BUSY for eMMC sleep command Date: Wed, 1 Apr 2020 18:16:19 +0200 Message-Id: <20200401161542.904988600@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200401161542.669484650@linuxfoundation.org> References: <20200401161542.669484650@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ulf Hansson [ Upstream commit 18d200460cd73636d4f20674085c39e32b4e0097 ] The busy timeout for the CMD5 to put the eMMC into sleep state, is specific to the card. Potentially the timeout may exceed the host->max_busy_timeout. If that becomes the case, mmc_sleep() converts from using an R1B response to an R1 response, as to prevent the host from doing HW busy detection. However, it has turned out that some hosts requires an R1B response no matter what, so let's respect that via checking MMC_CAP_NEED_RSP_BUSY. Note that, if the R1B gets enforced, the host becomes fully responsible of managing the needed busy timeout, in one way or the other. Suggested-by: Sowjanya Komatineni Cc: Link: https://lore.kernel.org/r/20200311092036.16084-1-ulf.hansson@linaro.org Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin --- drivers/mmc/core/mmc.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index f1fe446eee666..5ca53e225382d 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1901,9 +1901,12 @@ static int mmc_sleep(struct mmc_host *host) * If the max_busy_timeout of the host is specified, validate it against * the sleep cmd timeout. A failure means we need to prevent the host * from doing hw busy detection, which is done by converting to a R1 - * response instead of a R1B. + * response instead of a R1B. Note, some hosts requires R1B, which also + * means they are on their own when it comes to deal with the busy + * timeout. */ - if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) { + if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && host->max_busy_timeout && + (timeout_ms > host->max_busy_timeout)) { cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; } else { cmd.flags = MMC_RSP_R1B | MMC_CMD_AC; -- 2.20.1