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| author | Suzuki K Poulose <[email protected]> | 2016-05-06 15:35:50 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2016-06-16 00:13:06 -0700 |
| commit | 5014e904681ddbdf663bb20f134eb053ddccb181 (patch) | |
| tree | ee0ae74d3ec6d2a003f101a1ea6df69b57f25ff1 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | f3b8172fe15fbed0d0d33d99780e122213e00684 (diff) | |
coresight: Handle build path error
Enabling a component via sysfs (echo 1 > enable_source), would
trigger building a path from the enabled sources to the sink.
If there is an error in the process (e.g, sink not enabled or
the device (CPU corresponding to ETM) is not online), we never report
failure, except for leaving a message in the dmesg.
Do proper error checking for the build path and return the error.
Before:
$ echo 0 > /sys/devices/system/cpu/cpu2/online
$ echo 1 > /sys/devices/cs_etm/cpu2/enable_source
$ echo $?
0
After:
$ echo 0 > /sys/devices/system/cpu/cpu2/online
$ echo 1 > /sys/devices/cs_etm/cpu2/enable_source
-bash: echo: write error: No such device or address
Signed-off-by: Suzuki K Poulose <[email protected]>
Acked-by: Mathieu Poirier <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions