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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 /tools | |
| parent | 009d0431c3914de64666bec0d350e54fdd59df6a (diff) | |
| download | linux-16b7c275c055cc36218404b5d147be7f76575087.tar.gz | |
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 'tools')
| -rw-r--r-- | tools/power/cpupower/utils/cpuidle-info.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/power/cpupower/utils/cpuidle-info.c b/tools/power/cpupower/utils/cpuidle-info.c index 75e66de7e7a7..458d69b444ad 100644 --- a/tools/power/cpupower/utils/cpuidle-info.c +++ b/tools/power/cpupower/utils/cpuidle-info.c @@ -22,13 +22,13 @@ static void cpuidle_cpu_output(unsigned int cpu, int verbose) { - unsigned int idlestates, idlestate; + int idlestates, idlestate; char *tmp; printf(_ ("Analyzing CPU %d:\n"), cpu); idlestates = sysfs_get_idlestate_count(cpu); - if (idlestates == 0) { + if (idlestates < 1) { printf(_("CPU %u: No idle states\n"), cpu); return; } @@ -100,10 +100,10 @@ static void cpuidle_general_output(void) static void proc_cpuidle_cpu_output(unsigned int cpu) { long max_allowed_cstate = 2000000000; - unsigned int cstate, cstates; + int cstate, cstates; cstates = sysfs_get_idlestate_count(cpu); - if (cstates == 0) { + if (cstates < 1) { printf(_("CPU %u: No C-states info\n"), cpu); return; } |