linux/tools/power
Prarit Bhargava 16b7c275c0 tools: cpupower: fix return checks for sysfs_get_idlestate_count()
Red Hat and Fedora use a bug reporting tool that gathers data about
"broken" systems called sosreport.  Among other things, it includes the
output of 'cpupower idle-info'.  Executing 'cpupower idle-info' on a
system that has cpuidle disabled via 'cpuidle.off=1' results in a 300
second hang in the cpupower application.

ie)
[root@intel-brickland-05]# cpupower idle-info
Could not determine cpuidle driver

Analyzing CPU 0:
Number of idle states: -19
[hang]

The problem is that the cpupower code only checks for a zero return from
sysfs_get_idlestate_count().  The function can return -ENODEV (-19) as
above.  This patch fixes callers to sysfs_get_idlestate_count() to check
the right return values.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-05 03:12:34 +01:00
..
acpi ACPICA: acpiexec: Do not put STDIN into raw mode unless it is a terminal. 2014-10-21 00:39:40 +02:00
cpupower tools: cpupower: fix return checks for sysfs_get_idlestate_count() 2014-12-05 03:12:34 +01:00
x86 tools/power turbostat: tweak whitespace in output format 2014-08-15 17:34:44 -04:00