diff --git a/Documentation/wmi/devices/bitland-mifs-wmi.rst b/Documentation/wmi/devices/bitland-mifs-wmi.rst
index 314b3fbdda45..27c3fd248279 100644
--- a/Documentation/wmi/devices/bitland-mifs-wmi.rst
+++ b/Documentation/wmi/devices/bitland-mifs-wmi.rst
@@ -214,7 +214,8 @@ Performance Modes
 Changing the performance mode via Command ID 0x08 (SystemPerMode) affects the
 power limits (PL1/PL2) and fan curves managed by the Embedded Controller (EC).
 Note that the "Full-speed" and "Performance" mode (1, 3) is typically only
-available when the system is connected to a DC power source (not USB-C/PD).
+available when the system is connected to a DC power source (not USB-C/PD on
+model with a dedicated DC connector).
 
 In the driver implementation, switch to performance/full-speed mode without
 DC power connected will throw the EOPNOTSUPP error.
diff --git a/drivers/platform/x86/bitland-mifs-wmi.c b/drivers/platform/x86/bitland-mifs-wmi.c
index cdb930eb678d..dd1648b7de77 100644
--- a/drivers/platform/x86/bitland-mifs-wmi.c
+++ b/drivers/platform/x86/bitland-mifs-wmi.c
@@ -246,7 +246,11 @@ static int bitland_check_performance_capability(struct bitland_mifs_wmi_data *da
 		return -EOPNOTSUPP;
 
 	ret = bitland_mifs_wmi_call(data, &input, &output);
-	if (ret)
+	/* Not all systems support this function, do not perform further checks on them */
+	if (ret == -EOPNOTSUPP)
+		return 0;
+
+	if (ret < 0)
 		return ret;
 
 	if (output.data[0] != WMI_SYSTEM_AC_CIRCULARHOLE)