Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1491517
| From | Boris Ostrovsky <boris.ostrovsky@oracle.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] perf/bts: Don't try handling BTS interrupt if BTS is not enabled |
| Date | 2016-09-26 21:30 +0200 |
| Message-ID | <slJLc-7R2-27@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
Otherwise we will try to dereference ds which has not been allocated. Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> --- arch/x86/events/intel/bts.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/events/intel/bts.c b/arch/x86/events/intel/bts.c index bdcd651..1f5657f 100644 --- a/arch/x86/events/intel/bts.c +++ b/arch/x86/events/intel/bts.c @@ -451,6 +451,9 @@ int intel_bts_interrupt(void) s64 old_head; int err = -ENOSPC, handled = 0; + if (!x86_pmu.bts) + return 0; + /* * The only surefire way of knowing if this NMI is ours is by checking * the write ptr against the PMI threshold. -- 1.8.3.1
Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread
[PATCH] perf/bts: Don't try handling BTS interrupt if BTS is not enabled Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-09-26 21:30 +0200 Re: [PATCH] perf/bts: Don't try handling BTS interrupt if BTS is not enabled Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2016-09-26 23:10 +0200
csiph-web