[PATCH v2 3/6] cpufreq/amd-pstate: Make amd_pstate_get_mode_string() never return NULL

Mario Limonciello (AMD)
2025-10-09T16:18:06Z

amd_pstate_get_mode_string() is only used by amd-pstate-ut. Set the
failure path to use AMD_PSTATE_UNDEFINED ("undefined") to avoid showing
"(null)" as a string when running test suite.

Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
---
drivers/cpufreq/amd-pstate.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index a5b9e5baf4234..5feb9f5e3a491 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -70,8 +70,8 @@ static_assert(ARRAY_SIZE(amd_pstate_mode_string) == AMD_PSTATE_MAX);

const char *amd_pstate_get_mode_string(enum amd_pstate_mode mode)
{
- if (mode < 0 || mode >= AMD_PSTATE_MAX)
- return NULL;
+ if (mode < AMD_PSTATE_UNDEFINED || mode >= AMD_PSTATE_MAX)
+ mode = AMD_PSTATE_UNDEFINED;
return amd_pstate_mode_string[mode];
}
EXPORT_SYMBOL_GPL(amd_pstate_get_mode_string);
--
2.43.0