From: Seunguk Shin Subject: [PATCH] mmc: sdhci: remove delay during tuning command for mmc Date: Fri, 04 Apr 2014 21:07:19 +0900 Message-ID: <000001cf4ffe$6f8fdb60$4eaf9220$@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: Received: from mailout2.samsung.com ([203.254.224.25]:31082 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752582AbaDDMHX (ORCPT ); Fri, 4 Apr 2014 08:07:23 -0400 Received: from epcpsbgr2.samsung.com (u142.gpu120.samsung.co.kr [203.254.230.142]) by mailout2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N3I008KZ9O9C3A0@mailout2.samsung.com> for linux-mmc@vger.kernel.org; Fri, 04 Apr 2014 21:07:21 +0900 (KST) Content-language: ko Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: linux-mmc@vger.kernel.org, chris@printf.net, cpgs@samsung.com This change removes delay during tuning command for mmc. Because mmc does not need delay between tuning commands, and it could cause performance degradation. --- drivers/mmc/host/sdhci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 9a79fc4..bd266fa 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1992,7 +1992,8 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); tuning_loop_counter--; timeout--; - mdelay(1); + if (mmc->card->type != MMC_TYPE_MMC) + mdelay(1); } while (ctrl & SDHCI_CTRL_EXEC_TUNING); /* -- 1.8.3.2