Beacons setup and config was racy with beacon send. Ensure that
ISR and reset functions see consistent state of bbuf.
Use also dev_kfree_skb_any in ath5k_txbuf_free since we call it
from atomic now.
Signed-off-by: Jiri Slaby <jirislaby@xxxxxxxxx>
Cc: Nick Kossifidis <mickflemm@xxxxxxxxx>
Cc: Luis R. Rodriguez <mcgrof@xxxxxxxxx>
---
drivers/net/wireless/ath5k/base.c | 15 ++++++++++++---
drivers/net/wireless/ath5k/base.h | 1 +
2 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c
index fdfa4b8..b8178c7 100644
--- a/drivers/net/wireless/ath5k/base.c
+++ b/drivers/net/wireless/ath5k/base.c
@@ -253,7 +253,7 @@ static inline void ath5k_txbuf_free(struct ath5k_softc *sc,
return;
pci_unmap_single(sc->pdev, bf->skbaddr, bf->skb->len,
PCI_DMA_TODEVICE);
- dev_kfree_skb(bf->skb);
+ dev_kfree_skb_any(bf->skb);
bf->skb = NULL;
}
@@ -468,6 +468,7 @@ ath5k_pci_probe(struct pci_dev *pdev,
mutex_init(&sc->lock);
spin_lock_init(&sc->rxbuflock);
spin_lock_init(&sc->txbuflock);
+ spin_lock_init(&sc->block);
/* Set private data */
pci_set_drvdata(pdev, hw);
@@ -2148,8 +2149,11 @@ ath5k_beacon_config(struct ath5k_softc *sc)
sc->imask |= AR5K_INT_SWBA;
- if (ath5k_hw_hasveol(ah))
+ if (ath5k_hw_hasveol(ah)) {
+ spin_lock(&sc->block);
ath5k_beacon_send(sc);
+ spin_unlock(&sc->block);
+ }
}
/* TODO else AP */
@@ -2349,7 +2353,9 @@ ath5k_intr(int irq, void *dev_id)
TSF_TO_TU(tsf),
(unsigned long long) tsf);
} else {
+ spin_lock(&sc->block);
ath5k_beacon_send(sc);
+ spin_unlock(&sc->block);
}
}
if (status & AR5K_INT_RXEOL) {
@@ -3015,6 +3021,7 @@ static int
ath5k_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct ath5k_softc *sc = hw->priv;
+ unsigned long flags;
int ret;
ath5k_debug_dump_skb(sc, skb, "BC ", 1);
@@ -3024,12 +3031,14 @@ ath5k_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
goto end;
}
+ spin_lock_irqsave(&sc->block, flags);
ath5k_txbuf_free(sc, sc->bbuf);
sc->bbuf->skb = skb;
ret = ath5k_beacon_setup(sc, sc->bbuf);
if (ret)
sc->bbuf->skb = NULL;
- else {
+ spin_unlock_irqrestore(&sc->block, flags);
+ if (!ret) {
ath5k_beacon_config(sc);
mmiowb();
}
diff --git a/drivers/net/wireless/ath5k/base.h b/drivers/net/wireless/ath5k/base.h
index d7e03e6..7ec2f37 100644
--- a/drivers/net/wireless/ath5k/base.h
+++ b/drivers/net/wireless/ath5k/base.h
@@ -172,6 +172,7 @@ struct ath5k_softc {
struct tasklet_struct txtq; /* tx intr tasklet */
struct ath5k_led tx_led; /* tx led */
+ spinlock_t block; /* protects beacon */
struct ath5k_buf *bbuf; /* beacon buffer */
unsigned int bhalq, /* SW q for outgoing beacons */
bmisscount, /* missed beacon transmits */
--
1.5.6.5
--
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