From patchwork Thu Feb 20 01:47:19 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 3683841 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0343E9F2EC for ; Thu, 20 Feb 2014 01:32:32 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F1AD82010C for ; Thu, 20 Feb 2014 01:32:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DDC56201B6 for ; Thu, 20 Feb 2014 01:32:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752720AbaBTBc2 (ORCPT ); Wed, 19 Feb 2014 20:32:28 -0500 Received: from v094114.home.net.pl ([79.96.170.134]:59130 "HELO v094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751790AbaBTBc1 (ORCPT ); Wed, 19 Feb 2014 20:32:27 -0500 Received: from afna4.neoplus.adsl.tpnet.pl [178.42.78.4] (HELO vostro.rjw.lan) by serwer1319399.home.pl [79.96.170.134] with SMTP (IdeaSmtpServer v0.80) id 31260e55fbf0a473; Thu, 20 Feb 2014 02:32:26 +0100 From: "Rafael J. Wysocki" To: ACPI Devel Maling List Cc: Linux PCI , Linux Kernel Mailing List , Bjorn Helgaas , Tejun Heo , Aaron Lu Subject: [Update][PATCH 6/9] ACPI / ATA: Add hotplug contexts to ACPI companions of SATA devices Date: Thu, 20 Feb 2014 02:47:19 +0100 Message-ID: <5317534.79aoyQFAO7@vostro.rjw.lan> User-Agent: KMail/4.11.5 (Linux/3.13.0+; KDE/4.11.5; x86_64; ; ) In-Reply-To: <1707532.0BItEHDuFB@vostro.rjw.lan> References: <3011875.q18rCmXyYX@vostro.rjw.lan> <1707532.0BItEHDuFB@vostro.rjw.lan> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Rafael J. Wysocki Modify the SATA subsystem to add hotplug contexts to ACPI companions of SATA devices and ports instead of registering special ACPI dock operations using register_hotplug_dock_device(). That change will allow the entire code handling those special ACPI dock operations to be dropped in the next commit. Signed-off-by: Rafael J. Wysocki Reviewed-by: Aaron Lu --- As noted by Aaron, the hotplug contexts are not freed during ATA device unregistration, but that is not necessary, because the struct acpi_device things they are attached to never go away. However, they obviously should not be created more than once per struct acpi_device, so I've modified the patch to skip the creation of hotplug contexts for devices that already have them. Thanks, Rafael --- drivers/ata/libata-acpi.c | 76 +++++++++++++++++++++++++++++----------------- 1 file changed, 49 insertions(+), 27 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: linux-pm/drivers/ata/libata-acpi.c =================================================================== --- linux-pm.orig/drivers/ata/libata-acpi.c +++ linux-pm/drivers/ata/libata-acpi.c @@ -38,6 +38,16 @@ static void ata_acpi_clear_gtf(struct at dev->gtf_cache = NULL; } +struct ata_acpi_hotplug_context { + struct acpi_hotplug_context hp; + union { + struct ata_port *ap; + struct ata_device *dev; + } data; +}; + +#define ata_hotplug_data(context) (container_of((context), struct ata_acpi_hotplug_context, hp)->data) + /** * ata_dev_acpi_handle - provide the acpi_handle for an ata_device * @dev: the acpi_handle returned will correspond to this device @@ -121,18 +131,17 @@ static void ata_acpi_handle_hotplug(stru ata_port_wait_eh(ap); } -static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) +static int ata_acpi_dev_notify_dock(struct acpi_device *adev, u32 event) { - struct ata_device *dev = data; - + struct ata_device *dev = ata_hotplug_data(adev->hp).dev; ata_acpi_handle_hotplug(dev->link->ap, dev, event); + return 0; } -static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) +static int ata_acpi_ap_notify_dock(struct acpi_device *adev, u32 event) { - struct ata_port *ap = data; - - ata_acpi_handle_hotplug(ap, NULL, event); + ata_acpi_handle_hotplug(ata_hotplug_data(adev->hp).ap, NULL, event); + return 0; } static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, @@ -154,31 +163,23 @@ static void ata_acpi_uevent(struct ata_p } } -static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) +static void ata_acpi_ap_uevent(struct acpi_device *adev, u32 event) { - ata_acpi_uevent(data, NULL, event); + ata_acpi_uevent(ata_hotplug_data(adev->hp).ap, NULL, event); } -static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) +static void ata_acpi_dev_uevent(struct acpi_device *adev, u32 event) { - struct ata_device *dev = data; + struct ata_device *dev = ata_hotplug_data(adev->hp).dev; ata_acpi_uevent(dev->link->ap, dev, event); } -static const struct acpi_dock_ops ata_acpi_dev_dock_ops = { - .handler = ata_acpi_dev_notify_dock, - .uevent = ata_acpi_dev_uevent, -}; - -static const struct acpi_dock_ops ata_acpi_ap_dock_ops = { - .handler = ata_acpi_ap_notify_dock, - .uevent = ata_acpi_ap_uevent, -}; - /* bind acpi handle to pata port */ void ata_acpi_bind_port(struct ata_port *ap) { struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev); + struct acpi_device *adev; + struct ata_acpi_hotplug_context *context; if (libata_noacpi || ap->flags & ATA_FLAG_ACPI_SATA || !host_companion) return; @@ -188,9 +189,19 @@ void ata_acpi_bind_port(struct ata_port if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0) ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; - /* we might be on a docking station */ - register_hotplug_dock_device(ACPI_HANDLE(&ap->tdev), - &ata_acpi_ap_dock_ops, ap, NULL, NULL); + adev = ACPI_COMPANION(&ap->tdev); + if (!adev || adev->hp) + return; + + context = kzalloc(sizeof(*context), GFP_KERNEL); + if (!context) + return; + + context->data.ap = ap; + acpi_lock_hp_context(); + acpi_set_hp_context(adev, &context->hp, ata_acpi_ap_notify_dock, + ata_acpi_ap_uevent, NULL); + acpi_unlock_hp_context(); } void ata_acpi_bind_dev(struct ata_device *dev) @@ -198,7 +209,8 @@ void ata_acpi_bind_dev(struct ata_device struct ata_port *ap = dev->link->ap; struct acpi_device *port_companion = ACPI_COMPANION(&ap->tdev); struct acpi_device *host_companion = ACPI_COMPANION(ap->host->dev); - struct acpi_device *parent; + struct acpi_device *parent, *adev; + struct ata_acpi_hotplug_context *context; u64 adr; /* @@ -221,9 +233,19 @@ void ata_acpi_bind_dev(struct ata_device } acpi_preset_companion(&dev->tdev, parent, adr); + adev = ACPI_COMPANION(&dev->tdev); + if (!adev || adev->hp) + return; + + context = kzalloc(sizeof(*context), GFP_KERNEL); + if (!context) + return; - register_hotplug_dock_device(ata_dev_acpi_handle(dev), - &ata_acpi_dev_dock_ops, dev, NULL, NULL); + context->data.dev = dev; + acpi_lock_hp_context(); + acpi_set_hp_context(adev, &context->hp, ata_acpi_dev_notify_dock, + ata_acpi_dev_uevent, NULL); + acpi_unlock_hp_context(); } /**