Patch "Add "shutdown" to "struct class"." has been added to the 4.12-stable tree

gregkh
2017-07-08T08:59:13Z

This is a note to let you know that I've just added the patch titled

Add "shutdown" to "struct class".

to the 4.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
add-shutdown-to-struct-class.patch
and it can be found in the queue-4.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.

>From f77af15165847406b15d8f70c382c4cb15846b2a Mon Sep 17 00:00:00 2001
From: Josh Zimmerman <joshz@google.com>
Date: Sun, 25 Jun 2017 14:53:23 -0700
Subject: Add "shutdown" to "struct class".

From: Josh Zimmerman <joshz@google.com>

commit f77af15165847406b15d8f70c382c4cb15846b2a upstream.

The TPM class has some common shutdown code that must be executed for
all drivers. This adds some needed functionality for that.

Signed-off-by: Josh Zimmerman <joshz@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes: 74d6b3ceaa17 ("tpm: fix suspend/resume paths for TPM 2.0")
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/base/core.c | 6 +++++-
include/linux/device.h | 2 ++
2 files changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -2667,7 +2667,11 @@ void device_shutdown(void)
pm_runtime_get_noresume(dev);
pm_runtime_barrier(dev);

- if (dev->bus && dev->bus->shutdown) {
+ if (dev->class && dev->class->shutdown) {
+ if (initcall_debug)
+ dev_info(dev, "shutdown\n");
+ dev->class->shutdown(dev);
+ } else if (dev->bus && dev->bus->shutdown) {
if (initcall_debug)
dev_info(dev, "shutdown\n");
dev->bus->shutdown(dev);
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -378,6 +378,7 @@ int subsys_virtual_register(struct bus_t
* @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);

Patches currently in stable-queue which might be from joshz@google.com are

queue-4.12/add-shutdown-to-struct-class.patch
queue-4.12/tpm-issue-a-tpm2_shutdown-for-tpm2-devices.patch