diff options
| author | Zihuan Zhang <zhangzihuan@kylinos.cn> | 2025-08-22 15:04:23 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-08-22 21:33:22 +0200 |
| commit | e9e124501f0d7ea2caea94711efe50fe081a11ea (patch) | |
| tree | 25a9fc1c6ca2f127492a41bb343beda87063442a | |
| parent | c5746dc1898a1bd5518a03081dc7e380569e269d (diff) | |
cpufreq: use strlen() for governor name comparison
Most kernel code using strncasecmp()/strncmp() passes strlen("xxx")
as the length argument. cpufreq_parse_policy() previously used
CPUFREQ_NAME_LEN (16), which is longer than the actual strings
("performance" is 11 chars, "powersave" is 9 chars).
This patch switches to strlen() for the comparison, making the
matching slightly more permissive (e.g., "powersavexxx" will now
also match "powersave"). While this is unlikely to cause functional
issues, it aligns cpufreq with common kernel style and makes the
behavior more intuitive.
Signed-off-by: Zihuan Zhang <zhangzihuan@kylinos.cn>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://patch.msgid.link/20250822070424.166795-2-zhangzihuan@kylinos.cn
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index b8937737d096..d337f94f70a3 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -664,10 +664,10 @@ unlock: static unsigned int cpufreq_parse_policy(char *str_governor) { - if (!strncasecmp(str_governor, "performance", CPUFREQ_NAME_LEN)) + if (!strncasecmp(str_governor, "performance", strlen("performance"))) return CPUFREQ_POLICY_PERFORMANCE; - if (!strncasecmp(str_governor, "powersave", CPUFREQ_NAME_LEN)) + if (!strncasecmp(str_governor, "powersave", strlen("powersave"))) return CPUFREQ_POLICY_POWERSAVE; return CPUFREQ_POLICY_UNKNOWN; |