diff mbox series

mt76: mt7915: fix possible unaligned access in mt7915_mac_add_twt_setup

Message ID 439d9c01f6574dc021ce6eca4c8419a4e783d13e.1658742444.git.lorenzo@kernel.org (mailing list archive)
State Accepted
Delegated to: Felix Fietkau
Headers show
Series mt76: mt7915: fix possible unaligned access in mt7915_mac_add_twt_setup | expand

Commit Message

Lorenzo Bianconi July 25, 2022, 9:50 a.m. UTC 
Fix possible unaligned pointer in mt7915_mac_add_twt_setup routine.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 3782b69d03e71 ("mt76: mt7915: introduce mt7915_mac_add_twt_setup routine")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 drivers/net/wireless/mediatek/mt76/mt7915/mac.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 60ae834d95a6..b9b74c706d2c 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -2071,8 +2071,9 @@  void mt7915_mac_add_twt_setup(struct ieee80211_hw *hw,
 	}
 
 	flowid = ffs(~msta->twt.flowid_mask) - 1;
-	le16p_replace_bits(&twt_agrt->req_type, flowid,
-			   IEEE80211_TWT_REQTYPE_FLOWID);
+	twt_agrt->req_type &= ~cpu_to_le16(IEEE80211_TWT_REQTYPE_FLOWID);
+	twt_agrt->req_type |= le16_encode_bits(flowid,
+					       IEEE80211_TWT_REQTYPE_FLOWID);
 
 	table_id = ffs(~dev->twt.table_mask) - 1;
 	exp = FIELD_GET(IEEE80211_TWT_REQTYPE_WAKE_INT_EXP, req_type);
@@ -2122,8 +2123,9 @@  void mt7915_mac_add_twt_setup(struct ieee80211_hw *hw,
 unlock:
 	mutex_unlock(&dev->mt76.mutex);
 out:
-	le16p_replace_bits(&twt_agrt->req_type, setup_cmd,
-			   IEEE80211_TWT_REQTYPE_SETUP_CMD);
+	twt_agrt->req_type &= ~cpu_to_le16(IEEE80211_TWT_REQTYPE_SETUP_CMD);
+	twt_agrt->req_type |=
+		le16_encode_bits(setup_cmd, IEEE80211_TWT_REQTYPE_SETUP_CMD);
 	twt->control = (twt->control & IEEE80211_TWT_CONTROL_WAKE_DUR_UNIT) |
 		       (twt->control & IEEE80211_TWT_CONTROL_RX_DISABLED);
 }