[PATCH 5.15 402/913] drm/amd/pm: return -ENOTSUPP if there is no get_dpm_ultimate_freq function

[Greg Kroah-Hartman]

From: Tom Rix <trix@xxxxxxxxxx>

[ Upstream commit 430e6a0212b2a0eb1de5e9d47a016fa79edf3978 ]

clang static analysis reports this represenative problem
amdgpu_smu.c:144:18: warning: The left operand of '*' is a garbage value
        return clk_freq * 100;
               ~~~~~~~~ ^

If there is no get_dpm_ultimate_freq function,
smu_get_dpm_freq_range returns success without setting the
output min,max parameters.  So return an -ENOTSUPP error.

Fixes: e5ef784b1e17 ("drm/amd/powerplay: revise calling chain on retrieving frequency range")
Signed-off-by: Tom Rix <trix@xxxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index 6dc83cfad9d8..8acdb244b99f 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -138,7 +138,7 @@ int smu_get_dpm_freq_range(struct smu_context *smu,
 			   uint32_t *min,
 			   uint32_t *max)
 {
-	int ret = 0;
+	int ret = -ENOTSUPP;
 
 	if (!min && !max)
 		return -EINVAL;
-- 
2.34.1