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ath6kl: Fix crash during the connection process

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Sometimes, the network manager is failing to connect to the AP due
to the below kernel crash message. The reason behind this,
after issuing the connect command to the chip, the chip is sending
disconnect event and then immediately one connect event to the host
in some random cases.

The host driver resets all states (including cfg80211 state machine)
when it receives disconnect event from the chip. But, still the host
driver reports the next received connect event to cfg80211, at that time
cfg80211 SME state would have been in IDLE state, which was causing
the below kernel crash.

Now, host driver's sme state machine is checked every time before
delivering connect event to cfg80211

  WARNING: at net/wireless/sme.c:517 cfg80211_connect_result+0x10d/0x120()
  [..]
  Call Trace:
  [<c0145732>] warn_slowpath_common+0x72/0xa0
  [<c05d676d>] ? cfg80211_connect_result+0x10d/0x120
  [<c05d676d>] ? cfg80211_connect_result+0x10d/0x120
  [<c0145782>] warn_slowpath_null+0x22/0x30
  [<c05d676d>] cfg80211_connect_result+0x10d/0x120
  [<f83ff497>] ath6kl_cfg80211_connect_event+0x427/0x4f0 [ath6kl]
  [<c035d26a>] ? put_dec+0x2a/0xa0
  [<c035d645>] ? number+0x365/0x380
  [<c0154675>] ? mod_timer+0x135/0x260
  [<c035e00e>] ? format_decode+0x2fe/0x370
  [<c01263c8>] ? default_spin_lock_flags+0x8/0x10
  [<c05fd91f>] ? _raw_spin_lock_irqsave+0x2f/0x50
  [<c0146032>] ? console_unlock+0x172/0x1c0
  [<f8402659>] ath6kl_connect_event+0x89/0x400 [ath6kl]
  [<f840826e>] ath6kl_wmi_control_rx+0x98e/0x1d60 [ath6kl]
  [<c01335b5>] ? __wake_up+0x45/0x60
  [<f84053aa>] ath6kl_rx+0x56a/0x770 [ath6kl]
  [<c04d0242>] ? mmc_release_host+0x22/0x40
  [<c04d9329>] ? sdio_release_host+0x19/0x30
  [<f840a27a>] ? ath6kl_sdio_read_write_sync+0x7a/0xc0 [ath6kl]
  [<f83f82b1>] do_rx_completion+0x41/0x50 [ath6kl]
  [<f83faa6a>] htc_rxmsg_pending_handler+0x6ba/0xbd0 [ath6kl]
  [<f8404bb0>] ? ath6kl_tx_data_cleanup+0x30/0x30 [ath6kl]
  [<f840a1c0>] ? ath6kl_sdio_irq_handler+0x30/0x70 [ath6kl]
  [<f83f7cd5>] ath6kldev_intr_bh_handler+0x2a5/0x630 [ath6kl]
  [<f840a1c0>] ath6kl_sdio_irq_handler+0x30/0x70 [ath6kl]
  [<c04d97c7>] sdio_irq_thread+0xc7/0x2d0
  [<c013aeb0>] ? default_wake_function+0x10/0x20
  [<c012fc98>] ? __wake_up_common+0x48/0x70
  [<c04d9700>] ? sdio_claim_irq+0x200/0x200
  [<c0163854>] kthread+0x74/0x80
  [<c01637e0>] ? kthread_worker_fn+0x160/0x160
  [<c0604c06>] kernel_thread_helper+0x6/0x10

Signed-off-by: Raja Mani <rmani@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Raja Mani 2011-08-04 19:26:29 +05:30 committed by Kalle Valo
parent 91db35dae5
commit 9aa603578f
1 changed files with 3 additions and 3 deletions
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6
drivers/net/wireless/ath/ath6kl/cfg80211.c
View file

@ -559,14 +559,14 @@ void ath6kl_cfg80211_connect_event(struct ath6kl *ar, u16 channel,
return;
}
if (!test_bit(CONNECTED, &ar->flag)) {
if (ar->sme_state == SME_CONNECTING) {
/* inform connect result to cfg80211 */
ar->sme_state = SME_DISCONNECTED;
ar->sme_state = SME_CONNECTED;
cfg80211_connect_result(ar->net_dev, bssid,
assoc_req_ie, assoc_req_len,
assoc_resp_ie, assoc_resp_len,
WLAN_STATUS_SUCCESS, GFP_KERNEL);
} else {
} else if (ar->sme_state == SME_CONNECTED) {
/* inform roam event to cfg80211 */
cfg80211_roamed(ar->net_dev, ibss_ch, bssid,
assoc_req_ie, assoc_req_len,