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authorMohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>2011-12-26 10:42:15 +0530
committerGreg Kroah-Hartman <gregkh@suse.de>2012-01-06 15:38:03 -0800
commit2446257899d31ad4d0607231730d8d4968bf3e7a (patch)
treefbe6dfab2cb486f202ae42d87c5795c0f1e1ee40
parent39d67d758ca27dd3c182677c6700a539d2809480 (diff)
ath9k: Fix kernel panic in AR2427 in AP mode
commit b25bfda38236f349cde0d1b28952f4eea2148d3f upstream. don't do aggregation related stuff for 'AP mode client power save handling' if aggregation is not enabled in the driver, otherwise it will lead to panic because those data structures won't be never intialized in 'ath_tx_node_init' if aggregation is disabled EIP is at ath_tx_aggr_wakeup+0x37/0x80 [ath9k] EAX: e8c09a20 EBX: f2a304e8 ECX: 00000001 EDX: 00000000 ESI: e8c085e0 EDI: f2a304ac EBP: f40e1ca4 ESP: f40e1c8c DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 Process swapper/1 (pid: 0, ti=f40e0000 task=f408e860 task.ti=f40dc000) Stack: 0001e966 e8c09a20 00000000 f2a304ac e8c085e0 f2a304ac f40e1cb0 f8186741 f8186700 f40e1d2c f922988d f2a304ac 00000202 00000001 c0b4ba43 00000000 0000000f e8eb75c0 e8c085e0 205b0001 34383220 f2a304ac f2a30000 00010020 Call Trace: [<f8186741>] ath9k_sta_notify+0x41/0x50 [ath9k] [<f8186700>] ? ath9k_get_survey+0x110/0x110 [ath9k] [<f922988d>] ieee80211_sta_ps_deliver_wakeup+0x9d/0x350 [mac80211] [<c018dc75>] ? __module_address+0x95/0xb0 [<f92465b3>] ap_sta_ps_end+0x63/0xa0 [mac80211] [<f9246746>] ieee80211_rx_h_sta_process+0x156/0x2b0 [mac80211] [<f9247d1e>] ieee80211_rx_handlers+0xce/0x510 [mac80211] [<c018440b>] ? trace_hardirqs_on+0xb/0x10 [<c056936e>] ? skb_queue_tail+0x3e/0x50 [<f9248271>] ieee80211_prepare_and_rx_handle+0x111/0x750 [mac80211] [<f9248bf9>] ieee80211_rx+0x349/0xb20 [mac80211] [<f9248949>] ? ieee80211_rx+0x99/0xb20 [mac80211] [<f818b0b8>] ath_rx_tasklet+0x818/0x1d00 [ath9k] [<f8187a75>] ? ath9k_tasklet+0x35/0x1c0 [ath9k] [<f8187a75>] ? ath9k_tasklet+0x35/0x1c0 [ath9k] [<f8187b33>] ath9k_tasklet+0xf3/0x1c0 [ath9k] [<c0151b7e>] tasklet_action+0xbe/0x180 Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com> Cc: Rajkumar Manoharan <rmanohar@qca.qualcomm.com> Reported-by: Ashwin Mendonca <ashwinloyal@gmail.com> Tested-by: Ashwin Mendonca <ashwinloyal@gmail.com> Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/net/wireless/ath/ath9k/main.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 54e716a1a1f9..31be89b646d2 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2472,6 +2472,9 @@ static void ath9k_sta_notify(struct ieee80211_hw *hw,
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
+ if (!(sc->sc_flags & SC_OP_TXAGGR))
+ return;
+
switch (cmd) {
case STA_NOTIFY_ADD:
ath_node_attach(sc, sta);