ath9k: downgrade ASSERT() in ath_clone_txbuf()
We can easily run out of tx buf if there is any stuck in
transmission, so downgrade it to WARN_ON().
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index e08c817..5de9878 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -238,6 +238,10 @@
struct ath_buf *tbf;
spin_lock_bh(&sc->tx.txbuflock);
+ if (WARN_ON(list_empty(&sc->tx.txbuf))) {
+ spin_unlock_bh(&sc->tx.txbuflock);
+ return NULL;
+ }
ASSERT(!list_empty((&sc->tx.txbuf)));
tbf = list_first_entry(&sc->tx.txbuf, struct ath_buf, list);
list_del(&tbf->list);
@@ -379,6 +383,8 @@
struct ath_buf *tbf;
tbf = ath_clone_txbuf(sc, bf_last);
+ if (!tbf)
+ break;
ath9k_hw_cleartxdesc(sc->sc_ah, tbf->bf_desc);
list_add_tail(&tbf->list, &bf_head);
} else {