Messages in this thread | | | From | "Yuan, Perry" <> | Subject | RE: [PATCH v3 2/5] cpupower: Add is_valid_path API | Date | Tue, 20 Jun 2023 03:09:13 +0000 |
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[AMD Official Use Only - General]
> -----Original Message----- > From: Karny, Wyes <Wyes.Karny@amd.com> > Sent: Tuesday, June 20, 2023 3:05 AM > To: trenn@suse.com; shuah@kernel.org > Cc: linux-pm@vger.kernel.org; linux-kernel@vger.kernel.org; rafael@kernel.org; > Shenoy, Gautham Ranjal <gautham.shenoy@amd.com>; Limonciello, Mario > <Mario.Limonciello@amd.com>; Huang, Ray <Ray.Huang@amd.com>; Yuan, > Perry <Perry.Yuan@amd.com>; Karny, Wyes <Wyes.Karny@amd.com>; > Limonciello, Mario <Mario.Limonciello@amd.com> > Subject: [PATCH v3 2/5] 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> > --- > tools/power/cpupower/lib/cpupower.c | 7 +++++++ > tools/power/cpupower/lib/cpupower_intern.h | 1 + > 2 files changed, 8 insertions(+) > > 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); > -- > 2.34.1
Tested-by: Perry Yuan <Perry.Yuan@amd.com>
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