From: Luciano Coelho <luciano.coelho@xxxxxxxxx> We use ieee80211_iter_keys() which requires the rtnl to be held. If we don't lock the rtnl, like we do when we suspend during a d3 test, we get the following splat: RTNL: assertion failed at net/mac80211/key.c (566) CPU: 1 PID: 26529 Comm: cat Tainted: G W O 3.10.29-dev #1 Hardware name: Dell Inc. Latitude E6430/0CPWYR, BIOS A09 12/13/2012 e7b15008 e7b15008 e68adc1c c168aa62 e68adc54 f91f20b6 f923700c f9236fd8 00000236 00000000 ece23874 00000000 f94941e0 00000000 e43b8e48 e7b15008 00000000 e8b69e78 e68adcc0 f9493ab9 e68adc68 00000000 e43b8e48 e7b15008 Call Trace: [<c168aa62>] dump_stack+0x16/0x18 [<f91f20b6>] ieee80211_iter_keys+0x166/0x170 [mac80211] [<f94941e0>] ? iwl_mvm_query_wakeup_reasons+0x5f0/0x5f0 [iwlmvm] [<f9493ab9>] iwl_mvm_setup_connection_keep.isra.5+0x99/0x1d0 [iwlmvm] [<f9165e28>] ? cfg80211_report_wowlan_wakeup+0x308/0x510 [cfg80211] [<f9493fe5>] iwl_mvm_query_wakeup_reasons+0x3f5/0x5f0 [iwlmvm] [<c116125a>] ? init_object+0x3a/0x70 [<f8a5b8ee>] ? iwl_trans_pcie_d3_resume+0x1be/0x3a0 [iwlwifi] [<f94956da>] __iwl_mvm_resume+0x14a/0x180 [iwlmvm] [<f9495736>] iwl_mvm_d3_test_release+0x26/0xc0 [iwlmvm] [<c117a64d>] __fput+0xad/0x210 [<c117a7bd>] ____fput+0xd/0x10 [<c10601a1>] task_work_run+0x81/0xb0 [<c1040fa5>] do_exit+0x255/0xac0 [<c104e511>] ? dequeue_signal+0x31/0x1a0 [<c1041888>] do_group_exit+0x38/0xa0 [<c10a6cfb>] ? trace_hardirqs_on+0xb/0x10 [<c1051c31>] get_signal_to_deliver+0x1e1/0x8e0 [<c104bd52>] ? try_to_del_timer_sync+0x42/0x60 [<c104bd70>] ? try_to_del_timer_sync+0x60/0x60 [<c168dc82>] ? schedule_timeout+0x102/0x2a0 [<c10011ba>] do_signal+0x3a/0x8e0 [<c104b190>] ? __internal_add_timer+0xb0/0xb0 [<c168de7a>] ? schedule_timeout_interruptible+0x1a/0x20 [<c104ce39>] ? msleep_interruptible+0x39/0x40 [<f94939a9>] ? iwl_mvm_d3_test_read+0x49/0x70 [iwlmvm] [<c11797fc>] ? vfs_read+0x8c/0x160 [<c11243af>] ? SyS_fadvise64_64+0x15f/0x2b0 [<f9493960>] ? iwl_mvm_wowlan_program_keys+0x4a0/0x4a0 [iwlmvm] [<c1179a57>] ? SyS_read+0x57/0xa0 [<c1001acf>] do_notify_resume+0x6f/0xa0 [<c1692500>] work_notifysig+0x29/0x31 Fix this by hold the rtnl lock when calling __iwl_mvm_resume() in the d3 test wake up path. Signed-off-by: Luciano Coelho <luciano.coelho@xxxxxxxxx> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx> --- drivers/net/wireless/iwlwifi/mvm/d3.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/iwlwifi/mvm/d3.c b/drivers/net/wireless/iwlwifi/mvm/d3.c index c17be0f..5b26922 100644 --- a/drivers/net/wireless/iwlwifi/mvm/d3.c +++ b/drivers/net/wireless/iwlwifi/mvm/d3.c @@ -1741,7 +1741,9 @@ static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file) int remaining_time = 10; mvm->d3_test_active = false; + rtnl_lock(); __iwl_mvm_resume(mvm, true); + rtnl_unlock(); iwl_abort_notification_waits(&mvm->notif_wait); ieee80211_restart_hw(mvm->hw); -- 1.9.1 -- 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
