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[PATCH -next] mt76: mt7915: Fix unsigned comparison to zero

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Fixes coccicheck warnings:

./drivers/net/wireless/mediatek/mt76/mt7915/mcu.c:3450:5-8: WARNING: Unsigned expression compared with zero: idx < 0

Fixes: 495184ac91bb ("mt76: mt7915: add support for applying pre-calibration data")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Zou Wei <zou_wei@xxxxxxxxxx>
---
 drivers/net/wireless/mediatek/mt76/mt7915/mcu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index b3f14ff..764f25a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -3440,8 +3440,9 @@ int mt7915_mcu_apply_tx_dpd(struct mt7915_phy *phy)
 {
 	struct mt7915_dev *dev = phy->dev;
 	struct cfg80211_chan_def *chandef = &phy->mt76->chandef;
-	u16 total = 2, idx, center_freq = chandef->center_freq1;
+	u16 total = 2, center_freq = chandef->center_freq1;
 	u8 *cal = dev->cal, *eep = dev->mt76.eeprom.data;
+	int idx;
 
 	if (!(eep[MT_EE_DO_PRE_CAL] & MT_EE_WIFI_CAL_DPD))
 		return 0;
-- 
2.6.2




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