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| author | Felix Fietkau <nbd@openwrt.org> | 2010-12-05 16:26:38 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2010-12-05 16:26:38 +0000 |
| commit | 51a79d4b65d9d8569238d53577fd6ab93b490633 (patch) | |
| tree | 05a2f6cef2a3fc2b53f2402454e7457e0799e033 /package/mac80211 | |
| parent | 044ea01f9c6e81953620e5e8c6a9f9384572dd7b (diff) | |
| download | upstream-51a79d4b65d9d8569238d53577fd6ab93b490633.tar.gz upstream-51a79d4b65d9d8569238d53577fd6ab93b490633.tar.bz2 upstream-51a79d4b65d9d8569238d53577fd6ab93b490633.zip | |
ath9k: fix a DMA related race condition at hw reset time
SVN-Revision: 24261
Diffstat (limited to 'package/mac80211')
| -rw-r--r-- | package/mac80211/patches/520-ath9k_reset_fix.patch | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/package/mac80211/patches/520-ath9k_reset_fix.patch b/package/mac80211/patches/520-ath9k_reset_fix.patch new file mode 100644 index 0000000000..10175f9ffe --- /dev/null +++ b/package/mac80211/patches/520-ath9k_reset_fix.patch @@ -0,0 +1,74 @@ +--- a/drivers/net/wireless/ath/ath9k/xmit.c ++++ b/drivers/net/wireless/ath/ath9k/xmit.c +@@ -1172,7 +1172,7 @@ void ath_draintxq(struct ath_softc *sc, + } + } + +-void ath_drain_all_txq(struct ath_softc *sc, bool retry_tx) ++bool ath_drain_all_txq(struct ath_softc *sc, bool retry_tx) + { + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); +@@ -1180,7 +1180,7 @@ void ath_drain_all_txq(struct ath_softc + int i, npend = 0; + + if (sc->sc_flags & SC_OP_INVALID) +- return; ++ return true; + + /* Stop beacon queue */ + ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq); +@@ -1194,23 +1194,15 @@ void ath_drain_all_txq(struct ath_softc + } + } + +- if (npend) { +- int r; +- +- ath_print(common, ATH_DBG_FATAL, +- "Failed to stop TX DMA. Resetting hardware!\n"); +- +- r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false); +- if (r) +- ath_print(common, ATH_DBG_FATAL, +- "Unable to reset hardware; reset status %d\n", +- r); +- } ++ if (npend) ++ ath_print(common, ATH_DBG_FATAL, "Failed to stop TX DMA!\n"); + + for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { + if (ATH_TXQ_SETUP(sc, i)) + ath_draintxq(sc, &sc->tx.txq[i], retry_tx); + } ++ ++ return !npend; + } + + void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq) +--- a/drivers/net/wireless/ath/ath9k/ath9k.h ++++ b/drivers/net/wireless/ath/ath9k/ath9k.h +@@ -311,7 +311,7 @@ void ath_rx_cleanup(struct ath_softc *sc + int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp); + struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype); + void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq); +-void ath_drain_all_txq(struct ath_softc *sc, bool retry_tx); ++bool ath_drain_all_txq(struct ath_softc *sc, bool retry_tx); + void ath_draintxq(struct ath_softc *sc, + struct ath_txq *txq, bool retry_tx); + void ath_tx_node_init(struct ath_softc *sc, struct ath_node *an); +--- a/drivers/net/wireless/ath/ath9k/main.c ++++ b/drivers/net/wireless/ath/ath9k/main.c +@@ -246,9 +246,10 @@ int ath_set_channel(struct ath_softc *sc + * the relevant bits of the h/w. + */ + ath9k_hw_disable_interrupts(ah); +- ath_drain_all_txq(sc, false); ++ stopped = ath_drain_all_txq(sc, false); + +- stopped = ath_stoprecv(sc); ++ if (!ath_stoprecv(sc)) ++ stopped = false; + + /* XXX: do not flush receive queue here. We don't want + * to flush data frames already in queue because of |