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| author | Wyes Karny <wyes.karny@amd.com> | 2023-06-19 21:05:00 +0200 |
|---|---|---|
| committer | Shuah Khan <skhan@linuxfoundation.org> | 2023-07-19 00:06:44 +0200 |
| commit | 1ce5ab7c1dbfa82f0d382a48cccb51178cbf5416 (patch) | |
| tree | 55b7be76052c90cdb104d1be4f6daca131646862 /tools/power | |
| parent | cpupower: Recognise amd-pstate active mode driver (diff) | |
| download | linux-1ce5ab7c1dbfa82f0d382a48cccb51178cbf5416.tar.xz linux-1ce5ab7c1dbfa82f0d382a48cccb51178cbf5416.zip | |
cpupower: Add is_valid_path API
Add is_valid_path API to check whether the sysfs file is present or not.
Suggested-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Wyes Karny <wyes.karny@amd.com>
Tested-by: Perry Yuan <Perry.Yuan@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'tools/power')
| -rw-r--r-- | tools/power/cpupower/lib/cpupower.c | 7 | ||||
| -rw-r--r-- | tools/power/cpupower/lib/cpupower_intern.h | 1 |
2 files changed, 8 insertions, 0 deletions
diff --git a/tools/power/cpupower/lib/cpupower.c b/tools/power/cpupower/lib/cpupower.c index 3f7d0c0c5067..7a2ef691b20e 100644 --- a/tools/power/cpupower/lib/cpupower.c +++ b/tools/power/cpupower/lib/cpupower.c @@ -14,6 +14,13 @@ #include "cpupower.h" #include "cpupower_intern.h" +int is_valid_path(const char *path) +{ + if (access(path, F_OK) == -1) + return 0; + return 1; +} + unsigned int cpupower_read_sysfs(const char *path, char *buf, size_t buflen) { ssize_t numread; diff --git a/tools/power/cpupower/lib/cpupower_intern.h b/tools/power/cpupower/lib/cpupower_intern.h index ac1112b956ec..5fdb8620d41b 100644 --- a/tools/power/cpupower/lib/cpupower_intern.h +++ b/tools/power/cpupower/lib/cpupower_intern.h @@ -7,5 +7,6 @@ #define SYSFS_PATH_MAX 255 +int is_valid_path(const char *path); unsigned int cpupower_read_sysfs(const char *path, char *buf, size_t buflen); unsigned int cpupower_write_sysfs(const char *path, char *buf, size_t buflen); |