tools: cpupower: Fix error when running cpupower monitor
authorShreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Mon, 3 Aug 2015 06:16:00 +0000 (11:46 +0530)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Fri, 28 Aug 2015 23:38:16 +0000 (01:38 +0200)
commit404c2db635b0e41697eed165b045cb47fd729dd0
treed8d0908bf88770db3e5e30009a79a006ed0c5571
parent82bb70c599d81e6b2535f887b02e1719cc4856ac
tools: cpupower: Fix error when running cpupower monitor

get_cpu_topology() tries to get topology info from all cpus by reading
files in the topology sysfs dir. If a cpu is offlined, since it doesn't
have topology dir, this function fails and returns -1. This causes
functions relying on get_cpu_topology() to fail. For example-

$ cpupower monitor
Cannot read number of available processors

Fix this by skipping fetching topology info for offline cpus.

Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Reported-by: Pavaman Subramaniyam <pavsubra@linux.vnet.ibm.com>
Acked-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
tools/power/cpupower/utils/helpers/topology.c