Commit 86028598 authored Mar 05, 2009 by Paul Mackerras

perfcounters/powerpc: fix oops with multiple counters in a group



Impact: fix oops-causing bug

This fixes a bug in the powerpc hw_perf_counter_init where the code
didn't initialize ctrs[n] before passing the ctrs array to check_excludes,
leading to possible oopses and other incorrect behaviour.  This fixes it
by initializing ctrs[n] correctly.

Signed-off-by: Paul Mackerras <paulus@samba.org>

parent b5e8acf6

arch/powerpc/kernel/perf_counter.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -633,6 +633,7 @@ hw_perf_counter_init(struct perf_counter *counter)
		return NULL;
		}
		events[n] = ev;
		ctrs[n] = counter;
		if (check_excludes(ctrs, n, 1))
		return NULL;
		if (power_check_constraints(events, n + 1))