diff options
| author | Kan Liang | 2017-06-29 12:09:26 -0700 |
|---|---|---|
| committer | Thomas Gleixner | 2017-06-29 21:28:13 +0200 |
| commit | 80c65fdb4c6920e332a9781a3de5877594b07522 (patch) | |
| tree | 7a4d448c21dc2ba5c6e81a2828f449f60dad31f3 | |
| parent | 98fe3633c5a44e5ee3d642907739eb0210407886 (diff) | |
perf/x86/intel/uncore: Fix wrong box pointer check
Should not init a NULL box. It will cause system crash.
The issue looks like caused by a typo.
This was not noticed because there is no NULL box. Also, for most
boxes, they are enabled by default. The init code is not critical.
Fixes: fff4b87e594a ("perf/x86/intel/uncore: Make package handling more robust")
Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/20170629190926.2456-1-kan.liang@intel.com
| -rw-r--r-- | arch/x86/events/intel/uncore.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c index 758c1aa5009d..44ec523287f6 100644 --- a/arch/x86/events/intel/uncore.c +++ b/arch/x86/events/intel/uncore.c @@ -1170,7 +1170,7 @@ static int uncore_event_cpu_online(unsigned int cpu) pmu = type->pmus; for (i = 0; i < type->num_boxes; i++, pmu++) { box = pmu->boxes[pkg]; - if (!box && atomic_inc_return(&box->refcnt) == 1) + if (box && atomic_inc_return(&box->refcnt) == 1) uncore_box_init(box); } } |