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tools/power turbostat: Fix warning upon failed /dev/cpu_dma_latency read

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[ Upstream commit b6fe938317 ]

Previously a failed read of /dev/cpu_dma_latency erroneously complained
turbostat: capget(CAP_SYS_ADMIN) failed, try "# setcap cap_sys_admin=ep ./turbostat

This went unnoticed because this file is typically visible to root,
and turbostat was typically run as root.

Going forward, when a non-root user can run turbostat...
Complain about failed read access to this file only if --debug is used.

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Len Brown 2024-01-19 12:25:42 -06:00 committed by Greg Kroah-Hartman
parent 8a91872a54
commit 9678a79d14
1 changed files with 2 additions and 1 deletions
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3
tools/power/x86/turbostat/turbostat.c
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@ -5479,7 +5479,8 @@ void print_dev_latency(void)
fd = open(path, O_RDONLY);
if (fd < 0) {
warnx("capget(CAP_SYS_ADMIN) failed, try \"# setcap cap_sys_admin=ep %s\"", progname);
if (debug)
warnx("Read %s failed", path);
return;
}