diff --git a/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c b/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c
index b468051fbe68..0ffb277f9909 100644
--- a/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c
+++ b/drivers/net/wireless/mediatek/mt76/mt792x_acpi_sar.c
@@ -279,10 +279,18 @@ mt792x_asar_get_geo_pwr(struct mt792x_phy *phy,
 	if (idx >= max)
 		return dyn_power;
 
-	geo_power = (band_pwr + idx)->pwr;
-	dyn_power += (band_pwr + idx)->offset;
+	band_pwr += idx;
 
-	return min(geo_power, dyn_power);
+	/* Some OEM tables carry 0xff here; narrowed to s8 that is -1 and
+	 * wins the min() below. Take it as no limit.
+	 */
+	if (band_pwr->pwr == 0xff)
+		return dyn_power;
+
+	geo_power = band_pwr->pwr;
+
+	return min_t(int, geo_power,
+		     min_t(int, dyn_power + band_pwr->offset, 127));
 }
 
 static s8
@@ -315,7 +323,9 @@ mt792x_asar_range_pwr(struct mt792x_phy *phy,
 	else
 		band = NL80211_BAND_2GHZ;
 
-	return mt792x_asar_get_geo_pwr(phy, band, limit[idx]);
+	/* 0xff: no dynamic limit, see mt792x_asar_get_geo_pwr() */
+	return mt792x_asar_get_geo_pwr(phy, band,
+				       limit[idx] == 0xff ? 127 : limit[idx]);
 }
 
 int mt792x_init_acpi_sar_power(struct mt792x_phy *phy, bool set_default)