• Mohammed Shafi Shajakhan's avatar
    ath9k: Fix kernel panic in AR2427 in AP mode · b25bfda3
    Mohammed Shafi Shajakhan authored
    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: stable@kernel.org
    Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com>
    Cc: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
    Reported-by: default avatarAshwin Mendonca <ashwinloyal@gmail.com>
    Tested-by: default avatarAshwin Mendonca <ashwinloyal@gmail.com>
    Signed-off-by: default avatarMohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
    b25bfda3
main.c 60.9 KB