diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
index 40ba7227cca5..437ac31b1673 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
@@ -1439,6 +1439,9 @@ static int arcturus_set_power_profile_mode(struct smu_context *smu,
 
 	if ((profile_mode == PP_SMC_POWER_PROFILE_CUSTOM) &&
 	     (smu->smc_fw_version >= 0x360d00)) {
+		if (size != 10)
+			return -EINVAL;
+
 		ret = smu_cmn_update_table(smu,
 				       SMU_TABLE_ACTIVITY_MONITOR_COEFF,
 				       WORKLOAD_PPLIB_CUSTOM_BIT,
@@ -1472,6 +1475,8 @@ static int arcturus_set_power_profile_mode(struct smu_context *smu,
 			activity_monitor.Mem_PD_Data_error_coeff = input[8];
 			activity_monitor.Mem_PD_Data_error_rate_coeff = input[9];
 			break;
+		default:
+			return -EINVAL;
 		}
 
 		ret = smu_cmn_update_table(smu,
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
index ea95d5544668..22dbebeb4f12 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
@@ -2021,6 +2021,8 @@ static int navi10_set_power_profile_mode(struct smu_context *smu, long *input, u
 	}
 
 	if (smu->power_profile_mode == PP_SMC_POWER_PROFILE_CUSTOM) {
+		if (size != 10)
+			return -EINVAL;
 
 		ret = smu_cmn_update_table(smu,
 				       SMU_TABLE_ACTIVITY_MONITOR_COEFF, WORKLOAD_PPLIB_CUSTOM_BIT,
@@ -2064,6 +2066,8 @@ static int navi10_set_power_profile_mode(struct smu_context *smu, long *input, u
 			activity_monitor.Mem_PD_Data_error_coeff = input[8];
 			activity_monitor.Mem_PD_Data_error_rate_coeff = input[9];
 			break;
+		default:
+			return -EINVAL;
 		}
 
 		ret = smu_cmn_update_table(smu,
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
index 1f18b61884f3..5c6819c8fdd2 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
@@ -1722,6 +1722,8 @@ static int sienna_cichlid_set_power_profile_mode(struct smu_context *smu, long *
 	}
 
 	if (smu->power_profile_mode == PP_SMC_POWER_PROFILE_CUSTOM) {
+		if (size != 10)
+			return -EINVAL;
 
 		ret = smu_cmn_update_table(smu,
 				       SMU_TABLE_ACTIVITY_MONITOR_COEFF, WORKLOAD_PPLIB_CUSTOM_BIT,
@@ -1765,6 +1767,8 @@ static int sienna_cichlid_set_power_profile_mode(struct smu_context *smu, long *
 			activity_monitor->Mem_PD_Data_error_coeff = input[8];
 			activity_monitor->Mem_PD_Data_error_rate_coeff = input[9];
 			break;
+		default:
+			return -EINVAL;
 		}
 
 		ret = smu_cmn_update_table(smu,
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
index 67117ced7c6a..10f7fce4ebd0 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
@@ -2495,6 +2495,9 @@ static int smu_v13_0_0_set_power_profile_mode(struct smu_context *smu,
 	}
 
 	if (smu->power_profile_mode == PP_SMC_POWER_PROFILE_CUSTOM) {
+		if (size != 9)
+			return -EINVAL;
+
 		ret = smu_cmn_update_table(smu,
 					   SMU_TABLE_ACTIVITY_MONITOR_COEFF,
 					   WORKLOAD_PPLIB_CUSTOM_BIT,
@@ -2526,6 +2529,8 @@ static int smu_v13_0_0_set_power_profile_mode(struct smu_context *smu,
 			activity_monitor->Fclk_PD_Data_error_coeff = input[7];
 			activity_monitor->Fclk_PD_Data_error_rate_coeff = input[8];
 			break;
+		default:
+			return -EINVAL;
 		}
 
 		ret = smu_cmn_update_table(smu,
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
index 7318964f1f14..62570544d96b 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c
@@ -2450,6 +2450,8 @@ static int smu_v13_0_7_set_power_profile_mode(struct smu_context *smu, long *inp
 	}
 
 	if (smu->power_profile_mode == PP_SMC_POWER_PROFILE_CUSTOM) {
+		if (size != 8)
+			return -EINVAL;
 
 		ret = smu_cmn_update_table(smu,
 				       SMU_TABLE_ACTIVITY_MONITOR_COEFF, WORKLOAD_PPLIB_CUSTOM_BIT,
@@ -2478,6 +2480,8 @@ static int smu_v13_0_7_set_power_profile_mode(struct smu_context *smu, long *inp
 			activity_monitor->Fclk_MinActiveFreq = input[6];
 			activity_monitor->Fclk_BoosterFreq = input[7];
 			break;
+		default:
+			return -EINVAL;
 		}
 
 		ret = smu_cmn_update_table(smu,