diff options
Diffstat (limited to 'package/kernel/mac80211/patches/325-ath9k-Do-not-start-BA-when-scanning.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/325-ath9k-Do-not-start-BA-when-scanning.patch | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/package/kernel/mac80211/patches/325-ath9k-Do-not-start-BA-when-scanning.patch b/package/kernel/mac80211/patches/325-ath9k-Do-not-start-BA-when-scanning.patch deleted file mode 100644 index 69eb58c50f..0000000000 --- a/package/kernel/mac80211/patches/325-ath9k-Do-not-start-BA-when-scanning.patch +++ /dev/null @@ -1,60 +0,0 @@ -From: Sujith Manoharan <c_manoha@qca.qualcomm.com> -Date: Fri, 17 Oct 2014 07:40:30 +0530 -Subject: [PATCH] ath9k: Do not start BA when scanning - -mac80211 currently has a race which can be hit -with this sequence: - -* Start a scan operation. -* TX BA is initiated by ieee80211_start_tx_ba_session(). -* Driver sets up internal state and calls - ieee80211_start_tx_ba_cb_irqsafe(). -* mac80211 adds a packet to sdata->skb_queue with - type IEEE80211_SDATA_QUEUE_AGG_START. -* ieee80211_iface_work() doesn't process the - packet because scan is in progress. -* ADDBA response timer expires and the sta/tid is - torn down. -* Driver receives BA stop notification and calls - ieee80211_stop_tx_ba_cb_irqsafe(). -* This is also added to the queue by mac80211. -* Now, scan finishes. - -At this point, the queued up packets might be processed -if some other operation schedules the sdata work. Since -the tids have been cleaned up already, warnings are hit. - -If this doesn't happen, the packets are left in the queue -until the interface is torn down. - -Since initiating a BA session when scan is in progress -leads to flaky connections, especially in MCC mode, we -can drop the TX BA request. This improves connectivity -with legacy clients in MCC mode. - -Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com> ---- - ---- a/drivers/net/wireless/ath/ath9k/main.c -+++ b/drivers/net/wireless/ath/ath9k/main.c -@@ -1885,6 +1885,7 @@ static int ath9k_ampdu_action(struct iee - u16 tid, u16 *ssn, u8 buf_size) - { - struct ath_softc *sc = hw->priv; -+ struct ath_common *common = ath9k_hw_common(sc->sc_ah); - bool flush = false; - int ret = 0; - -@@ -1896,6 +1897,12 @@ static int ath9k_ampdu_action(struct iee - case IEEE80211_AMPDU_RX_STOP: - break; - case IEEE80211_AMPDU_TX_START: -+ if (ath9k_is_chanctx_enabled()) { -+ if (test_bit(ATH_OP_SCANNING, &common->op_flags)) { -+ ret = -EBUSY; -+ break; -+ } -+ } - ath9k_ps_wakeup(sc); - ret = ath_tx_aggr_start(sc, sta, tid, ssn); - if (!ret) |