6.15-stable review patch. If anyone has any objections, please let me know.
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From: Len Brown len.brown@intel.com
[ Upstream commit e60a13bcef206795d3ddf82f130fe8f570176d06 ]
/sys/devices/system/cpu/intel_uncore_frequency/package_X_die_Y/ may be readable by all, but /sys/devices/system/cpu/intel_uncore_frequency/package_X_die_Y/current_freq_khz may be readable only by root.
Non-root turbostat users see complaints in this scenario.
Fail probe of the interface if we can't read current_freq_khz.
Reported-by: Artem Bityutskiy artem.bityutskiy@linux.intel.com Original-patch-by: Zhang Rui rui.zhang@intel.com Signed-off-by: Len Brown len.brown@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/power/x86/turbostat/turbostat.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 444b6bfb4683..3e97b69b1dfb 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -6690,7 +6690,8 @@ static void probe_intel_uncore_frequency_legacy(void) sprintf(path_base, "/sys/devices/system/cpu/intel_uncore_frequency/package_%02d_die_%02d", i, j);
- if (access(path_base, R_OK)) + sprintf(path, "%s/current_freq_khz", path_base); + if (access(path, R_OK)) continue;
BIC_PRESENT(BIC_UNCORE_MHZ);