This is a note to let you know that I've just added the patch titled
powerpc/pseries/cmm: Implement release() function for sysfs device
to the 4.4-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:
powerpc-pseries-cmm-implement-release-function-for-s.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit be18a0e8f3eb05d8cc191fe4391f0e921e77dc4c
Author: David Hildenbrand <david@xxxxxxxxxx>
Date: Thu Oct 31 15:29:22 2019 +0100
powerpc/pseries/cmm: Implement release() function for sysfs device
[ Upstream commit 7d8212747435c534c8d564fbef4541a463c976ff ]
When unloading the module, one gets
------------[ cut here ]------------
Device 'cmm0' does not have a release() function, it is broken and must be fixed. See Documentation/kobject.txt.
WARNING: CPU: 0 PID: 19308 at drivers/base/core.c:1244 .device_release+0xcc/0xf0
...
We only have one static fake device. There is nothing to do when
releasing the device (via cmm_exit()).
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20191031142933.10779-2-david@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c
index fc44ad0475f8..b126ce49ae7b 100644
--- a/arch/powerpc/platforms/pseries/cmm.c
+++ b/arch/powerpc/platforms/pseries/cmm.c
@@ -391,6 +391,10 @@ static struct bus_type cmm_subsys = {
.dev_name = "cmm",
};
+static void cmm_release_device(struct device *dev)
+{
+}
+
/**
* cmm_sysfs_register - Register with sysfs
*
@@ -406,6 +410,7 @@ static int cmm_sysfs_register(struct device *dev)
dev->id = 0;
dev->bus = &cmm_subsys;
+ dev->release = cmm_release_device;
if ((rc = device_register(dev)))
goto subsys_unregister;
