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| author | Kaushlendra Kumar <kaushlendra.kumar@intel.com> | 2025-12-01 15:17:45 +0300 |
|---|---|---|
| committer | Shuah Khan <skhan@linuxfoundation.org> | 2025-12-15 22:33:28 +0300 |
| commit | f9bd3762cf1bd0c2465f2e6121b340883471d1bf (patch) | |
| tree | 9a4e92dbada29aa7763fd6d29f3966537807e58a | |
| parent | 1b9aaf36b7b40235e5a529c15848c3d866362207 (diff) | |
| download | linux-f9bd3762cf1bd0c2465f2e6121b340883471d1bf.tar.xz | |
tools/power cpupower: Reset errno before strtoull()
cpuidle_state_get_one_value() never cleared errno before calling
strtoull(), so a prior ERANGE caused every cpuidle counter read to
return zero. Reset errno to 0 before the conversion so each sysfs read
is evaluated independently.
Link: https://lore.kernel.org/r/20251201121745.3776703-1-kaushlendra.kumar@intel.com
Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
| -rw-r--r-- | tools/power/cpupower/lib/cpuidle.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/power/cpupower/lib/cpuidle.c b/tools/power/cpupower/lib/cpuidle.c index 6a881d93d2e9..2fcb343d8e75 100644 --- a/tools/power/cpupower/lib/cpuidle.c +++ b/tools/power/cpupower/lib/cpuidle.c @@ -150,6 +150,7 @@ unsigned long long cpuidle_state_get_one_value(unsigned int cpu, if (len == 0) return 0; + errno = 0; value = strtoull(linebuf, &endp, 0); if (endp == linebuf || errno == ERANGE) |