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ath9k: Fix powersave locking

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The 'ps_flags' is used/accessed in a variety of contexts
and requires proper locking. Use 'sc_pm_lock' appropriately.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith Manoharan
2012-06-04 20:24:07 +05:30
committed by John W. Linville
parent b74713d04e
commit 07c15a3ffd
3 changed files with 21 additions and 9 deletions
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3
drivers/net/wireless/ath/ath9k/xmit.c
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@@ -1994,6 +1994,7 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data;
int q, padpos, padsize;
unsigned long flags;
ath_dbg(common, XMIT, "TX complete: skb: %p\n", skb);
@@ -2012,6 +2013,7 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
skb_pull(skb, padsize);
}
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if ((sc->ps_flags & PS_WAIT_FOR_TX_ACK) && !txq->axq_depth) {
sc->ps_flags &= ~PS_WAIT_FOR_TX_ACK;
ath_dbg(common, PS,
@@ -2021,6 +2023,7 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
PS_WAIT_FOR_PSPOLL_DATA |
PS_WAIT_FOR_TX_ACK));
}
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
q = skb_get_queue_mapping(skb);
if (txq == sc->tx.txq_map[q]) {