4.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Kim Phillips <[email protected]> [ Upstream commit 344353366591acf659a0d0dea498611da78d67e2 ] The auxtrace init variable 'err' was not being initialized, leading perf to abort early in an SPE record command when there was no explicit error, rather only based whatever memory contents were on the stack. Initialize it explicitly on getting an SPE successfully, the same way cs-etm does. Signed-off-by: Kim Phillips <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Dongjiu Geng <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Fixes: ffd3d18c20b8 ("perf tools: Add ARM Statistical Profiling Extensions (SPE) support") Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- tools/perf/arch/arm64/util/arm-spe.c | 1 + 1 file changed, 1 insertion(+) --- a/tools/perf/arch/arm64/util/arm-spe.c +++ b/tools/perf/arch/arm64/util/arm-spe.c @@ -194,6 +194,7 @@ struct auxtrace_record *arm_spe_recordin sper->itr.read_finish = arm_spe_read_finish; sper->itr.alignment = 0; + *err = 0; return &sper->itr; }
