Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932494AbdGCSHf (ORCPT ); Mon, 3 Jul 2017 14:07:35 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:37322 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932168AbdGCSHb (ORCPT ); Mon, 3 Jul 2017 14:07:31 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 858AA607E0 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=nwatters@codeaurora.org From: Nate Watterson To: Tejun Heo , linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Nate Watterson Subject: [PATCH 1/2] libata: Introduce ata_platform_shutdown_one() Date: Mon, 3 Jul 2017 14:02:41 -0400 Message-Id: <1499104962-17498-1-git-send-email-nwatters@codeaurora.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2425 Lines: 64 In similar fashion to how ata_platform_remove_one() is used, this newly introduced method can be used by platform ata drivers to get basic shutdown functionality (stopping host DMA and interrupts). Signed-off-by: Nate Watterson --- drivers/ata/libata-core.c | 20 ++++++++++++++++++++ include/linux/libata.h | 1 + 2 files changed, 21 insertions(+) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index e157a0e..537932e 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -6702,6 +6702,25 @@ int ata_platform_remove_one(struct platform_device *pdev) return 0; } +/** + * ata_platform_shutdown_one - Platform layer callback for device shutdown + * @pdev: Platform device being shutdown + * + * Platform layer indicates to libata via this hook that shutdown is + * in progress and the input device should be quiesced. Functionally this + * is equivalent to ata_platform_remove_one(), however devres_release_all() + * is not called on the shutdown path as it is for remove so releasing the + * resources associated with the device must instead be initiated directly. + */ +void ata_platform_shutdown_one(struct platform_device *pdev) +{ + struct ata_host *host = platform_get_drvdata(pdev); + + ata_host_detach(host); + devres_release(&pdev->dev, ata_host_stop, NULL, NULL); + devres_release(&pdev->dev, ata_host_release, NULL, NULL); +} + static int __init ata_parse_force_one(char **cur, struct ata_force_ent *force_ent, const char **reason) @@ -7222,6 +7241,7 @@ void ata_print_version(const struct device *dev, const char *version) #endif /* CONFIG_PCI */ EXPORT_SYMBOL_GPL(ata_platform_remove_one); +EXPORT_SYMBOL_GPL(ata_platform_shutdown_one); EXPORT_SYMBOL_GPL(__ata_ehi_push_desc); EXPORT_SYMBOL_GPL(ata_ehi_push_desc); diff --git a/include/linux/libata.h b/include/linux/libata.h index c9a69fc..6c01f23f 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1240,6 +1240,7 @@ struct pci_bits { struct platform_device; extern int ata_platform_remove_one(struct platform_device *pdev); +extern void ata_platform_shutdown_one(struct platform_device *pdev); /* * ACPI - drivers/ata/libata-acpi.c -- Qualcomm Datacenter Technologies, Inc. on behalf of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.