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| author | Prarit Bhargava <prarit@redhat.com> | 2014-12-01 09:39:22 -0500 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-12-05 03:12:34 +0100 |
| commit | 16b7c275c055cc36218404b5d147be7f76575087 (patch) | |
| tree | c7b170c8eab5c804e5fd74958e22b76c4cb0b880 /kernel/power | |
| parent | 009d0431c3914de64666bec0d350e54fdd59df6a (diff) | |
| download | linux-16b7c275c055cc36218404b5d147be7f76575087.tar.bz2 | |
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>
Diffstat (limited to 'kernel/power')
0 files changed, 0 insertions, 0 deletions