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This patch simplifies running code on shutdown for USB devices by adding a shutdown callback to usb_driver. Signed-off-by: Kerem Karabay Signed-off-by: Aditya Garg --- drivers/usb/core/driver.c | 14 ++++++++++++++ include/linux/usb.h | 3 +++ 2 files changed, 17 insertions(+) diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index e02ba15f6..b35734d03 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -517,6 +517,19 @@ static int usb_unbind_interface(struct device *dev) return 0; } +static void usb_shutdown_interface(struct device *dev) +{ + struct usb_interface *intf = to_usb_interface(dev); + struct usb_driver *driver; + + if (!dev->driver) + return; + + driver = to_usb_driver(dev->driver); + if (driver->shutdown) + driver->shutdown(intf); +} + /** * usb_driver_claim_interface - bind a driver to an interface * @driver: the driver to be bound @@ -1059,6 +1072,7 @@ int usb_register_driver(struct usb_driver *new_driver, struct module *owner, new_driver->driver.bus = &usb_bus_type; new_driver->driver.probe = usb_probe_interface; new_driver->driver.remove = usb_unbind_interface; + new_driver->driver.shutdown = usb_shutdown_interface; new_driver->driver.owner = owner; new_driver->driver.mod_name = mod_name; new_driver->driver.dev_groups = new_driver->dev_groups; diff --git a/include/linux/usb.h b/include/linux/usb.h index 1913a1383..832997a9d 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -1171,6 +1171,7 @@ extern ssize_t usb_show_dynids(struct usb_dynids *dynids, char *buf); * post_reset method is called. * @post_reset: Called by usb_reset_device() after the device * has been reset + * @shutdown: Called at shut-down time to quiesce the device. * @id_table: USB drivers use ID table to support hotplugging. * Export this with MODULE_DEVICE_TABLE(usb,...). This must be set * or your driver's probe function will never get called. @@ -1222,6 +1223,8 @@ struct usb_driver { int (*pre_reset)(struct usb_interface *intf); int (*post_reset)(struct usb_interface *intf); + void (*shutdown)(struct usb_interface *intf); + const struct usb_device_id *id_table; const struct attribute_group **dev_groups; From patchwork Sat Jul 6 10:01:38 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aditya Garg X-Patchwork-Id: 13725806 Received: from IND01-BMX-obe.outbound.protection.outlook.com (mail-bmxind01olkn2106.outbound.protection.outlook.com [40.92.103.106]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F20003399F; Sat, 6 Jul 2024 10:01:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.92.103.106 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; 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Sat, 6 Jul 2024 10:01:38 +0000 From: Aditya Garg To: "gregkh@linuxfoundation.org" , "oneukum@suse.com" , "stern@rowland.harvard.edu" CC: Kerem Karabay , Orlando Chamberlain , Linux Kernel Mailing List , "linux-usb@vger.kernel.org" , "linux-scsi@vger.kernel.org" , "usb-storage@lists.one-eyed-alien.net" Subject: [PATCH v2 2/2] scsi: usb: uas: Implement the new shutdown callback Thread-Topic: [PATCH v2 2/2] scsi: usb: uas: Implement the new shutdown callback Thread-Index: AQHaz4t+VjkiMxF+7kWm0GtAei2JZA== Date: Sat, 6 Jul 2024 10:01:38 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-IN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-tmn: [pwObd6efDSo5L+n51THClYj64pmXlzlR4hhgqZrXw9FvJqeYQkeQmecd4ZtaVn/g6yWNUeLNXQI=] x-ms-publictraffictype: Email x-ms-traffictypediagnostic: MA0P287MB0217:EE_|PN2P287MB1372:EE_ x-ms-office365-filtering-correlation-id: c2ed1494-49b5-4d21-63a1-08dc9da2a099 x-microsoft-antispam: BCL:0;ARA:14566002|461199028|8060799006|19110799003|440099028|3412199025|102099032; 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Signed-off-by: Kerem Karabay Signed-off-by: Aditya Garg --- drivers/usb/storage/uas.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c index b610a2de4..0cdbcf825 100644 --- a/drivers/usb/storage/uas.c +++ b/drivers/usb/storage/uas.c @@ -1232,9 +1232,8 @@ static void uas_disconnect(struct usb_interface *intf) * hang on reboot when the device is still in uas mode. Note the reset is * necessary as some devices won't revert to usb-storage mode without it. */ -static void uas_shutdown(struct device *dev) +static void uas_shutdown(struct usb_interface *intf) { - struct usb_interface *intf = to_usb_interface(dev); struct usb_device *udev = interface_to_usbdev(intf); struct Scsi_Host *shost = usb_get_intfdata(intf); struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; @@ -1257,7 +1256,7 @@ static struct usb_driver uas_driver = { .suspend = uas_suspend, .resume = uas_resume, .reset_resume = uas_reset_resume, - .driver.shutdown = uas_shutdown, + .shutdown = uas_shutdown, .id_table = uas_usb_ids, };