From: sunliming@linux.dev
To: nbd@nbd.name, lorenzo@kernel.org, ryder.lee@mediatek.com,
shayne.chen@mediatek.com, sean.wang@mediatek.com,
matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com,
chui-hao.chiu@mediatek.com, Bo.Jiao@mediatek.com,
linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org
Cc: sunliming <sunliming@kylinos.cn>,
kernel test robot <lkp@intel.com>,
Dan Carpenter <error27@gmail.com>
Subject: [PATCH] wifi: mt76: mt7996: fix variable dereferenced before check warning
Date: Sat, 19 Apr 2025 10:54:17 +0800 [thread overview]
Message-ID: <20250419025417.2066787-1-sunliming@linux.dev> (raw)
From: sunliming <sunliming@kylinos.cn>
Fix below smatch warnings:
drivers/net/wireless/mediatek/mt76/mt7996/main.c:73 mt7996_stop_phy() warn:
variable dereferenced before check 'phy' (see line 71)
drivers/net/wireless/mediatek/mt76/mt7996/main.c:360 mt7996_set_monitor() warn:
variable dereferenced before check 'phy' (see line 358)
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Closes: https://lore.kernel.org/r/202504101051.1ya4Z4va-lkp@intel.com/
Signed-off-by: sunliming <sunliming@kylinos.cn>
---
drivers/net/wireless/mediatek/mt76/mt7996/main.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/main.c b/drivers/net/wireless/mediatek/mt76/mt7996/main.c
index 91c64e3a0860..cc6bb4544c2a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/main.c
@@ -68,11 +68,13 @@ static int mt7996_start(struct ieee80211_hw *hw)
static void mt7996_stop_phy(struct mt7996_phy *phy)
{
- struct mt7996_dev *dev = phy->dev;
+ struct mt7996_dev *dev;
if (!phy || !test_bit(MT76_STATE_RUNNING, &phy->mt76->state))
return;
+ dev = phy->dev;
+
cancel_delayed_work_sync(&phy->mt76->mac_work);
mutex_lock(&dev->mt76.mutex);
@@ -414,11 +416,13 @@ static void mt7996_phy_set_rxfilter(struct mt7996_phy *phy)
static void mt7996_set_monitor(struct mt7996_phy *phy, bool enabled)
{
- struct mt7996_dev *dev = phy->dev;
+ struct mt7996_dev *dev;
if (!phy)
return;
+ dev = phy->dev;
+
if (enabled == !(phy->rxfilter & MT_WF_RFCR_DROP_OTHER_UC))
return;
--
2.25.1
reply other threads:[~2025-04-19 2:55 UTC|newest]
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