I understand why the ac pointer is null in ath_tx_aggr_wakeup function. My wireless card receive packet, the ieee80211_rx function is called. This function call indirectly ath_tx_aggr_wakeup function and my kernel crash because the ac pointer is null. The Ac pointer is null because the sta_state is set to IEEE80211_STA_NONE, and on this state the function ath_tx_node_init (in net/wireless/ath/ath9k/xmit.c) is not already called (call only when the sta_state go to IEEE80211_STA_ASSOC from IEEE80211_STA_AUTH ) Have you any idea to fix it ? The kernel panic call stack ath_tx_aggr_wakeup+0x64/0xe4 [ath9k] (unreliable) [ 128.340486] [c7ffbd10] [c92b0b34] ath9k_deinit_device+0x8d0/0xb28 [ath9k] [ 128.347324] [c7ffbd20] [c9173cf4] ieee80211_sta_ps_deliver_wakeup+0xa4/0x1e4 [mac80211] [ 128.355365] [c7ffbd50] [c91a3f74] ieee80211_mps_sta_status_update+0xe4/0x158 [mac80211] [ 128.363403] [c7ffbd70] [c9186f28] ieee80211_sta_ps_transition+0xff0/0x34e4 [mac80211] [ 128.371268] [c7ffbe00] [c91893b0] ieee80211_sta_ps_transition+0x3478/0x34e4 [mac80211] [ 128.379219] [c7ffbe40] [c9189ae8] ieee80211_rx+0x6cc/0x798 [mac80211] [ 128.385678] [c7ffbea0] [c92b43c4] ath_rx_tasklet+0xe80/0xf74 [ath9k] [ 128.392039] [c7ffbf70] [c92b1fdc] ath9k_tasklet+0xd0/0x114 [ath9k] [ 128.398219] [c7ffbf90] [c0020b04] tasklet_action+0x88/0xe0 [ 128.403694] [c7ffbfb0] [c0021228] __do_softirq+0xa4/0x12c [ 128.409088] [c7ffbff0] [c000cec8] call_do_softirq+0x14/0x24 [ 128.414655] [c73b7ee0] [c000550c] do_softirq+0x64/0xa4 [ 128.419783] [c73b7f00] [c0021464] irq_exit+0x48/0x74 [ 128.424739] [c73b7f10] [c0005424] do_IRQ+0x108/0x120 [ 128.429697] [c73b7f40] [c000ec5c] ret_from_except+0x0/0x14 Cedric Voncken -----Message d'origine----- De : linux-wireless-owner@xxxxxxxxxxxxxxx [mailto:linux-wireless-owner@xxxxxxxxxxxxxxx] De la part de Cedric VONCKEN Envoyé : mardi 16 avril 2013 18:26 À : linux-wireless@xxxxxxxxxxxxxxx Objet : ath9k null ppointer I tried to use a mesh network with security (meshd/authsae). I am using : - openwrt with the latest mac80211 package from openwrt (2013-02-22). - the Thomas Pedersen patch to add the authsae package in my openwrt source tree (http://permalink.gmane.org/gmane.linux.drivers.mesh.open80211s/2530) (Use the latest version, because I sent a patch in meshd this morning, without it the HT mode should not correctly enable) - AR9xx wirless card - Kernel 3.3.8 on power PC (mpc 8314) When I configure the meshd daemon to use the HT mode, I have a null pointer in ath9k (That work correctly without HT mode). In the file, drivers/net/wireless/ath/ath9k in the function ath_tx_aggr_wakeup the ac pointer is null. Do you know why this pointer can be null? Cedric Voncken -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
