This is a note to let you know that I've just added the patch titled
PM / Domains: Fix removal of a subdomain
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:
pm-domains-fix-removal-of-a-subdomain.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.
>From beda5fc1ff9b527059290a97b672d2ee0eb7b92f Mon Sep 17 00:00:00 2001
From: Jon Hunter <jonathanh@xxxxxxxxxx>
Date: Fri, 4 Mar 2016 10:55:14 +0000
Subject: PM / Domains: Fix removal of a subdomain
From: Jon Hunter <jonathanh@xxxxxxxxxx>
commit beda5fc1ff9b527059290a97b672d2ee0eb7b92f upstream.
Commit 30e7a65b3fdb (PM / Domains: Ensure subdomain is not in use
before removing) added a test to ensure that a subdomain is not a
master to another subdomain or if any devices are using the subdomain
before removing. This change incorrectly used the "slave_links" list to
determine if the subdomain is a master to another subdomain, where it
should have been using the "master_links" list instead. The
"slave_links" list will never be empty for a subdomain and so a
subdomain can never be removed. Fix this by testing if the
"master_links" list is empty instead.
Fixes: 30e7a65b3fdb (PM / Domains: Ensure subdomain is not in use before removing)
Signed-off-by: Jon Hunter <jonathanh@xxxxxxxxxx>
Reviewed-by: Thierry Reding <treding@xxxxxxxxxx>
Acked-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Acked-by: Kevin Hilman <khilman@xxxxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/base/power/domain.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1381,7 +1381,7 @@ int pm_genpd_remove_subdomain(struct gen
mutex_lock(&genpd->lock);
- if (!list_empty(&subdomain->slave_links) || subdomain->device_count) {
+ if (!list_empty(&subdomain->master_links) || subdomain->device_count) {
pr_warn("%s: unable to remove subdomain %s\n", genpd->name,
subdomain->name);
ret = -EBUSY;
Patches currently in stable-queue which might be from jonathanh@xxxxxxxxxx are
queue-4.4/arm-omap2-hwmod-fix-updating-of-sysconfig-register.patch
queue-4.4/pm-domains-fix-removal-of-a-subdomain.patch
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