This is a note to let you know that I've just added the patch titled
bus: arm-ccn: Prevent hotplug callback leak
to the 4.9-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:
bus-arm-ccn-prevent-hotplug-callback-leak.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 26242b330093fd14c2e94fb6cbdf0f482ab26576 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date: Thu, 22 Dec 2016 11:14:06 +0100
Subject: bus: arm-ccn: Prevent hotplug callback leak
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
commit 26242b330093fd14c2e94fb6cbdf0f482ab26576 upstream.
In case the driver registration fails, the hotplug callback is leaked.
Not fatal, because it's never invoked as there are no instances registered,
but wrong nevertheless.
Fixes: fdc15a36d84e ("bus/arm-ccn: Convert to hotplug statemachine")
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Pawel Moll <pawel.moll@xxxxxxx>
Cc: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/bus/arm-ccn.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/bus/arm-ccn.c
+++ b/drivers/bus/arm-ccn.c
@@ -1570,7 +1570,10 @@ static int __init arm_ccn_init(void)
for (i = 0; i < ARRAY_SIZE(arm_ccn_pmu_events); i++)
arm_ccn_pmu_events_attrs[i] = &arm_ccn_pmu_events[i].attr.attr;
- return platform_driver_register(&arm_ccn_driver);
+ ret = platform_driver_register(&arm_ccn_driver);
+ if (ret)
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE);
+ return ret;
}
static void __exit arm_ccn_exit(void)
Patches currently in stable-queue which might be from tglx@xxxxxxxxxxxxx are
queue-4.9/bus-arm-ccn-prevent-hotplug-callback-leak.patch
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