diff options
| author | Vivek Natarajan <vnatarajan@atheros.com> | 2011-01-27 12:15:08 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-01-28 23:44:28 +0300 |
| commit | 181fb18daaf88a20175b0da70024563b0b7c0666 (patch) | |
| tree | 2b3c3d8ff01e37880027d25c1b67579bba68e797 /drivers/net/wireless/ath/ath9k/xmit.c | |
| parent | b141581923ab4904052174e3b4eb17cc3ce8632c (diff) | |
| download | linux-181fb18daaf88a20175b0da70024563b0b7c0666.tar.xz | |
ath9k: Fix a PLL hang issue observed with AR9485.
When this PLL hang issue is seen, both Rx and Tx fail to work.
The sqsum_dvc needs to be below 2000 for a good chip. During
this issue the sqsum_dvc value is beyond 80000 and only a
full reset can solve this problem.
Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/xmit.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/xmit.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index 879365e9b1c9..10a3dbefaa09 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -2091,6 +2091,28 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq) } } +static void ath_hw_pll_work(struct work_struct *work) +{ + struct ath_softc *sc = container_of(work, struct ath_softc, + hw_pll_work.work); + static int count; + + if (AR_SREV_9485(sc->sc_ah)) { + if (ar9003_get_pll_sqsum_dvc(sc->sc_ah) >= 0x40000) { + count++; + + if (count == 3) { + /* Rx is hung for more than 500ms. Reset it */ + ath_reset(sc, true); + count = 0; + } + } else + count = 0; + + ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5); + } +} + static void ath_tx_complete_poll_work(struct work_struct *work) { struct ath_softc *sc = container_of(work, struct ath_softc, @@ -2312,6 +2334,7 @@ int ath_tx_init(struct ath_softc *sc, int nbufs) } INIT_DELAYED_WORK(&sc->tx_complete_work, ath_tx_complete_poll_work); + INIT_DELAYED_WORK(&sc->hw_pll_work, ath_hw_pll_work); if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { error = ath_tx_edma_init(sc); |