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power: fix environment detection

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Anything coming from sysfs has a newline at the end. Cut it off before
comparing the strings.

Fixes: 20ab67608a ("power: add environment capability probing")

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>
Tested-by: Lihong Ma <lihongx.ma@intel.com>
Reviewed-by: Bruce Richardson <bruce.richardson@intel.com>
This commit is contained in:
Anatoly Burakov 2020-07-14 11:30:01 +01:00 committed by Thomas Monjalon
parent 9dbe628a7b
commit 8b7b02f945
1 changed files with 8 additions and 0 deletions
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8
lib/librte_power/power_common.c
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@ -17,6 +17,7 @@ cpufreq_check_scaling_driver(const char *driver_name)
unsigned int lcore_id = 0; /* always check core 0 */
char fullpath[PATH_MAX];
char readbuf[PATH_MAX];
size_t end_idx;
char *s;
FILE *f;
@ -39,6 +40,13 @@ cpufreq_check_scaling_driver(const char *driver_name)
if (s == NULL)
return 0;
/* when read from sysfs, driver name has an extra newline at the end */
end_idx = strnlen(readbuf, sizeof(readbuf));
if (end_idx > 0 && readbuf[end_idx - 1] == '\n') {
end_idx--;
readbuf[end_idx] = '\0';
}
/* does the driver name match? */
if (strncmp(readbuf, driver_name, sizeof(readbuf)) != 0)
return 0;