[PATCH] cpupower: Fix querying boost support for amd-pstate-epp mode

From: Mario Limonciello
Date: Fri Aug 11 2023 - 17:36:08 EST


When running in active mode the driver for amd-pstate has -epp appended.
This throws off amd-pstate detection.

To detect amd-pstate look for the prefix instead.

Fixes: ffa5096a7c33 ("cpufreq: amd-pstate: implement Pstate EPP support for the AMD processors")
Reported-by: chenhq2005@xxxxxxxxx
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217755
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
tools/power/cpupower/utils/helpers/misc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c
index 9547b29254a7f..01c0440efe850 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -95,7 +95,7 @@ bool cpupower_amd_pstate_enabled(void)
if (!driver)
return ret;

- if (!strcmp(driver, "amd-pstate"))
+ if (!strncmp(driver, "amd-pstate", 10))
ret = true;

cpufreq_put_driver(driver);
--
2.34.1