From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760494AbdEORe4 (ORCPT ); Mon, 15 May 2017 13:34:56 -0400 Received: from mail-pg0-f46.google.com ([74.125.83.46]:35027 "EHLO mail-pg0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759476AbdEORer (ORCPT ); Mon, 15 May 2017 13:34:47 -0400 From: Josh Zimmerman To: Greg Kroah-Hartman , linux-kernel@vger.kernel.org Cc: Jarkko Sakkinen , Jason Gunthorpe , tpmdd-devel@lists.sourceforge.net, Josh Zimmerman Subject: [PATCH v3] Add "shutdown" to "struct class". Date: Mon, 15 May 2017 10:34:38 -0700 Message-Id: <20170515173438.13420-1-joshz@google.com> X-Mailer: git-send-email 2.13.0.rc2.291.g57267f2277-goog Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The TPM class has some common shutdown code that must be executed for all drivers. This adds some needed functionality for that. Usage example: 'tpm: Issue a TPM2_Shutdown for TPM2 devices.' (see https://patchwork.kernel.org/patch/9724919/ for v2). Signed-off-by: Josh Zimmerman ----- v2: Add Signed-off-by. v3: Remove logically separate change. --- drivers/base/core.c | 5 +++++ include/linux/device.h | 2 ++ 2 files changed, 7 insertions(+) diff --git a/drivers/base/core.c b/drivers/base/core.c index bbecaf9293be..5c1648875e94 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -2667,6 +2667,11 @@ void device_shutdown(void) pm_runtime_get_noresume(dev); pm_runtime_barrier(dev); + if (dev->class && dev->class->shutdown) { + if (initcall_debug) + dev_info(dev, "shutdown\n"); + dev->class->shutdown(dev); + } if (dev->bus && dev->bus->shutdown) { if (initcall_debug) dev_info(dev, "shutdown\n"); diff --git a/include/linux/device.h b/include/linux/device.h index 9ef518af5515..f240baac2001 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -378,6 +378,7 @@ int subsys_virtual_register(struct bus_type *subsys, * @suspend: Used to put the device to sleep mode, usually to a low power * state. * @resume: Used to bring the device from the sleep mode. + * @shutdown: Called at shut-down time to quiesce the device. * @ns_type: Callbacks so sysfs can detemine namespaces. * @namespace: Namespace of the device belongs to this class. * @pm: The default device power management operations of this class. @@ -407,6 +408,7 @@ struct class { int (*suspend)(struct device *dev, pm_message_t state); int (*resume)(struct device *dev); + int (*shutdown)(struct device *dev); const struct kobj_ns_type_operations *ns_type; const void *(*namespace)(struct device *dev); -- 2.13.0.rc2.291.g57267f2277-goog