From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755448AbbGFMW7 (ORCPT ); Mon, 6 Jul 2015 08:22:59 -0400 Received: from mga11.intel.com ([192.55.52.93]:31455 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755377AbbGFMWz (ORCPT ); Mon, 6 Jul 2015 08:22:55 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,414,1432623600"; d="scan'208";a="756824134" From: Andy Shevchenko To: linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, Greg Kroah-Hartman , Vinod Koul , Lee Jones , Andrew Morton , Mika Westerberg , linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, Heikki Krogerus , Jarkko Nikula , "Wysocki, Rafael J" , mturquette@baylibre.com Cc: Andy Shevchenko Subject: [PATCH v5 6/8] mfd: make mfd_remove_devices() iterate in reverse order Date: Mon, 6 Jul 2015 15:22:12 +0300 Message-Id: <1436185334-34275-7-git-send-email-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1436185334-34275-1-git-send-email-andriy.shevchenko@linux.intel.com> References: <1436185334-34275-1-git-send-email-andriy.shevchenko@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The newly introduced device_for_each_child_reverse() would be used when MFD core removes the device. After this patch applied the devices will be removed in a reversed order. This behaviour is useful when devices have implicit dependency on order, i.e. consider MFD device with serial bus controller, such as SPI, and DMA IP that is attached to serial bus controller: before remove the DMA driver we have to be ensured that no DMA transfers is ongoing and the requested channel are unused. Signed-off-by: Andy Shevchenko --- drivers/mfd/mfd-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c index 14fd5cb..c17635d 100644 --- a/drivers/mfd/mfd-core.c +++ b/drivers/mfd/mfd-core.c @@ -302,7 +302,7 @@ void mfd_remove_devices(struct device *parent) { atomic_t *cnts = NULL; - device_for_each_child(parent, &cnts, mfd_remove_devices_fn); + device_for_each_child_reverse(parent, &cnts, mfd_remove_devices_fn); kfree(cnts); } EXPORT_SYMBOL(mfd_remove_devices); -- 2.1.4