Return-path: Received: from mx1.redhat.com ([209.132.183.28]:64791 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751327Ab0INOea (ORCPT ); Tue, 14 Sep 2010 10:34:30 -0400 Date: Tue, 14 Sep 2010 16:28:15 +0200 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: "John W. Linville" , Johannes Berg , "David S. Miller" , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Reinette Chatre , Wey-Yi Guy , Intel Linux Wireless Subject: 2.6.36-rc4/iwl: warning triggered in net/mac80211/scan.c:266 Message-ID: <20100914142814.GA8744@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-wireless-owner@vger.kernel.org List-ID: I am running 2.6.36-rc4 on T60 with an iwlagn wireless card: 03:00.0 Network controller: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection I was compiling a large file which stressed the box heavily, and the following warning in net/mac80211/scan.c triggered: /* * It's ok to abort a not-yet-running scan (that * we have one at all will be verified by checking * local->scan_req next), but not to complete it * successfully. */ if (WARN_ON(!local->scanning && !aborted)) aborted = true; dmesg below: [84379.361297] ------------[ cut here ]------------ [84379.361307] WARNING: at net/mac80211/scan.c:266 ieee80211_scan_completed+0x43/0x17f() [84379.361311] Hardware name: 2241B48 [84379.361313] Modules linked in: tun iwlagn kvm_intel kvm iwlcore e1000e thinkpad_acpi [last unloaded: scsi_wait_scan] [84379.361325] Pid: 8254, comm: kworker/u:0 Not tainted 2.6.36-rc4-mst #96 [84379.361328] Call Trace: [84379.361334] [] ? ieee80211_scan_completed+0x43/0x17f [84379.361340] [] warn_slowpath_common+0x80/0x99 [84379.361354] [] ? iwl_generic_cmd_callback+0x0/0xe4 [iwlcore] [84379.361359] [] warn_slowpath_null+0x15/0x17 [84379.361363] [] ieee80211_scan_completed+0x43/0x17f [84379.361374] [] iwl_bg_scan_completed+0x1ce/0x1d7 [iwlcore] [84379.361380] [] process_one_work+0x1e2/0x301 [84379.361391] [] ? iwl_bg_scan_completed+0x0/0x1d7 [iwlcore] [84379.361395] [] worker_thread+0x130/0x243 [84379.361400] [] ? worker_thread+0x0/0x243 [84379.361404] [] kthread+0x81/0x89 [84379.361409] [] kernel_thread_helper+0x4/0x10 [84379.361413] [] ? kthread+0x0/0x89 [84379.361417] [] ? kernel_thread_helper+0x0/0x10 [84379.361420] ---[ end trace c5ebbd902daa4ea8 ]--- [84379.361422] ------------[ cut here ]------------ [84379.361426] WARNING: at net/mac80211/scan.c:269 ieee80211_scan_completed+0x62/0x17f() [84379.361429] Hardware name: 2241B48 [84379.361431] Modules linked in: tun iwlagn kvm_intel kvm iwlcore e1000e thinkpad_acpi [last unloaded: scsi_wait_scan] [84379.361441] Pid: 8254, comm: kworker/u:0 Tainted: G W 2.6.36-rc4-mst #96 [84379.361461] Call Trace: [84379.361464] [] ? ieee80211_scan_completed+0x62/0x17f [84379.361469] [] warn_slowpath_common+0x80/0x99 [84379.361479] [] ? iwl_generic_cmd_callback+0x0/0xe4 [iwlcore] [84379.361484] [] warn_slowpath_null+0x15/0x17 [84379.361488] [] ieee80211_scan_completed+0x62/0x17f [84379.361503] [] iwl_bg_scan_completed+0x1ce/0x1d7 [iwlcore] [84379.361506] [] process_one_work+0x1e2/0x301 [84379.361512] [] ? iwl_bg_scan_completed+0x0/0x1d7 [iwlcore] [84379.361515] [] worker_thread+0x130/0x243 [84379.361517] [] ? worker_thread+0x0/0x243 [84379.361519] [] kthread+0x81/0x89 [84379.361522] [] kernel_thread_helper+0x4/0x10 [84379.361524] [] ? kthread+0x0/0x89 [84379.361526] [] ? kernel_thread_helper+0x0/0x10 [84379.361528] ---[ end trace c5ebbd902daa4ea9 ]--- Should this happen? Does anyone care? I am not sure how reproducible this is. Thanks, -- MST