ath9k: Fix some smatch warnings

drivers/net/wireless/ath/ath9k/hif_usb.c +135 hif_usb_mgmt_cb(6) warn:
variable dereferenced before check 'cmd'
drivers/net/wireless/ath/ath9k/btcoex.c +77 ath9k_hw_init_btcoex_hw(38)
error: buffer overflow 'ah->hw_gen_timers.gen_timer_index' 32 <=
2009813776

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 8 insertions, 4 deletions

diff --git a/drivers/net/wireless/ath/ath9k/btcoex.c b/drivers/net/wireless/ath/ath9k/btcoex.c
index 41ce0b13988..6635c377dc0 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.c
+++ b/drivers/net/wireless/ath/ath9k/btcoex.c
@@ -50,7 +50,7 @@ void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
                 .bt_first_slot_time = 5,
                 .bt_hold_rx_clear = true,
         };
-        u32 i;
+        u32 i, idx;
         bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;
 
         if (AR_SREV_9300_20_OR_LATER(ah))
@@ -73,8 +73,10 @@ void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
                 SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) |
                 AR_BT_DISABLE_BT_ANT;
 
-        for (i = 0; i < 32; i++)
-                ah->hw_gen_timers.gen_timer_index[(debruijn32 << i) >> 27] = i;
+        for (i = 0; i < 32; i++) {
+                idx = (debruijn32 << i) >> 27;
+                ah->hw_gen_timers.gen_timer_index[idx] = i;
+        }
 }
 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
 
diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
index 1d11ae101d6..d3f4a59cd45 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -130,12 +130,14 @@ static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
 static void hif_usb_mgmt_cb(struct urb *urb)
 {
         struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
-        struct hif_device_usb *hif_dev = cmd->hif_dev;
+        struct hif_device_usb *hif_dev;
         bool txok = true;
 
         if (!cmd || !cmd->skb || !cmd->hif_dev)
                 return;
 
+        hif_dev = cmd->hif_dev;
+
         switch (urb->status) {
         case 0:
                 break;