From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933437Ab3CNBXY (ORCPT ); Wed, 13 Mar 2013 21:23:24 -0400 Received: from mail-we0-f169.google.com ([74.125.82.169]:49446 "EHLO mail-we0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755679Ab3CNBXX (ORCPT ); Wed, 13 Mar 2013 21:23:23 -0400 From: Sergey Yanovich To: Chris Ball Cc: Sergey Yanovich , Greg Kroah-Hartman , Ulf Hansson , Linus Walleij , Jaehoon Chung , Namjae Jeon , linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org Subject: [PATCH v2] wait while adding MMC host to ensure root mounts Date: Thu, 14 Mar 2013 05:23:13 +0400 Message-Id: <1363224194-7366-1-git-send-email-ynvich@gmail.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1363223183-3772-1-git-send-email-ynvich@gmail.com> References: <1363223183-3772-1-git-send-email-ynvich@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org MMC hosts are added asynchronously. We need to wait until detect returns to avoid failed root filesystem mounts. ---8<--- VFS: Cannot open root device "mmcblk0p1" or unknown-block(0,0): error -6 Please append a correct "root=" boot option; here are the available partitions: mmc0: host does not support reading read-only switch. assuming write-enable. 1f00 256 mtdblock0 (driver?) 1f01 256 mtdblock1 (driver?) 1f02 2560 mtdblock2 mmc0: new SDHC card at address b368 (driver?) 1f03 29696 mtdblock3 (driver?) 1f04 16384 mtdblock4 mmcblk0: mmc0:b368 USD 3.72 GiB (driver?) mmcblk0: p1 b300 3910656 mmcblk0 driver: mmcblk b301 3906560 mmcblk0p1 00000000-01 Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ---8<--- Signed-off-by: Sergey Yanovich --- changes for v2: - removed exporting as symbol is in the same file drivers/mmc/core/core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index aaed768..7196888 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2225,6 +2225,7 @@ void mmc_start_host(struct mmc_host *host) host->rescan_disable = 0; mmc_power_up(host); mmc_detect_change(host, 0); + mmc_flush_scheduled_work(); } void mmc_stop_host(struct mmc_host *host) -- 1.7.10.4