On Fri, Sep 23, 2011 at 10:39 PM, Larry Finger <Larry.Finger@xxxxxxxxxxxx> wrote: > A bug was sent to me concerning a scheduling-while-atomic-BUG. This happened > shortly after KDE suspended an eeepc1015PE netbook during system update over > WLAN. Suspend&resume normally worked allright. The OP is Berhard Wiedemann > in the Cc list. Inquiries for more info go to him. > > The kernel is 3.1-rc5 from the openSUSE Factory repo on a 32-bit system. > > The device is: > > 02:00.0 Network controller [0280]: Ralink corp. RT3090 Wireless 802.11n > 1T/1R PCIe [1814:3090] > > The dmesg error dump is > > [23281.115155] BUG: scheduling while atomic: kworker/u:22/12821/0x00000101 > [23281.115166] Modules linked in: loop af_packet tun coretemp microcode > sha256_generic cbc dm_crypt fuse dm_mod arc4 rt2800pci rt2800lib crc_ccitt > rt2x00pci rt2x00lib mac80211 snd_hda_codec_realtek cfg80211 snd_hda_intel > snd_hda_codec snd_hwdep snd_pcm uvcvideo videodev snd_timer snd eeepc_wmi > asus_wmi sparse_keymap pci_hotplug rfkill soundcore eeprom_93cx6 > snd_page_alloc iTCO_wdt sg pcspkr iTCO_vendor_support battery atl1c wmi > joydev ac autofs4 i915 drm_kms_helper drm i2c_algo_bit button video fan > thermal processor thermal_sys > [23281.115299] Modules linked in: loop af_packet tun coretemp microcode > sha256_generic cbc dm_crypt fuse dm_mod arc4 rt2800pci rt2800lib crc_ccitt > rt2x00pci rt2x00lib mac80211 snd_hda_codec_realtek cfg80211 snd_hda_intel > snd_hda_codec snd_hwdep snd_pcm uvcvideo videodev snd_timer snd eeepc_wmi > asus_wmi sparse_keymap pci_hotplug rfkill soundcore eeprom_93cx6 > snd_page_alloc iTCO_wdt sg pcspkr iTCO_vendor_support battery atl1c wmi > joydev ac autofs4 i915 drm_kms_helper drm i2c_algo_bit button video fan > thermal processor thermal_sys > [23281.115403] > [23281.115412] Pid: 12821, comm: kworker/u:22 Not tainted > 3.1.0-rc5-2-desktop #1 ASUSTeK Computer INC. 1015P/1015PE > [23281.115426] EIP: 0060:[<f7b9c43b>] EFLAGS: 00000282 CPU: 1 > [23281.115440] EIP is at rt2x00pci_regbusy_read+0xb/0xd0 [rt2x00pci] > [23281.115447] EAX: f2915160 EBX: f2915160 ECX: f7baa2a0 EDX: 00007010 > [23281.115454] ESI: f2915160 EDI: 00007010 EBP: 000000ff ESP: f1db1e2c > [23281.115461] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 > [23281.115470] Process kworker/u:22 (pid: 12821, ti=f4910000 task=eb86a4b0 > task.ti=f1db0000) > [23281.115477] Stack: > [23281.115482] 00000000 f1db1e60 8e97f4be 001e8480 ffffffff eb86a4e4 > f2414f24 eb86a4b0 > [23281.115503] 00000001 f2915160 f29153f0 000000ff f7bce81d 00000018 > ff000000 f1db1e70 > [23281.115521] 013020a0 f1db1e84 f2915160 f2915160 fffffdf4 f2914320 > f7ba8965 000000ff > [23281.115541] Call Trace: > [23281.115576] [<f7bce81d>] rt2800_mcu_request.part.27+0x5d/0xd0 > [rt2800lib] > [23281.115612] [<f7ba8965>] rt2800pci_set_state+0x55/0x90 [rt2800pci] > [23281.115638] [<f7ba90a5>] rt2800pci_set_device_state+0xd5/0x13b > [rt2800pci] > [23281.115670] [<f7bcdc82>] rt2800_config_ps.isra.19+0x82/0xe0 [rt2800lib] > [23281.115706] [<f7bbf5c1>] rt2x00lib_config+0xd1/0x280 [rt2x00lib] > [23281.115744] [<f7bbec56>] rt2x00mac_config+0x36/0x80 [rt2x00lib] > [23281.115789] [<f8201fb0>] ieee80211_hw_config+0xc0/0x130 [mac80211] > [23281.115830] [<f820ca7c>] ieee80211_dynamic_ps_enable_work+0x18c/0x280 > [mac80211] > [23281.115927] [<c0262f5e>] process_one_work+0xee/0x400 > [23281.115945] [<c026356e>] worker_thread+0x11e/0x2c0 > [23281.115960] [<c0266d19>] kthread+0x69/0x70 > [23281.115976] [<c070d3e6>] kernel_thread_helper+0x6/0xd > [23281.115987] Code: 81 fa 00 00 00 01 19 c0 f7 d0 05 d1 00 00 00 eb d4 b8 > f4 ff ff ff eb 8c 90 8d b4 26 00 00 00 00 55 57 89 d7 56 53 89 c3 83 ec 20 > <8b> 8b 38 02 00 00 8b 44 24 38 8b 54 24 34 8b 6c 24 3c 89 44 24 > [23281.116133] Call Trace: > [23281.116163] [<f7bce81d>] rt2800_mcu_request.part.27+0x5d/0xd0 > [rt2800lib] > [23281.116196] [<f7ba8965>] rt2800pci_set_state+0x55/0x90 [rt2800pci] > [23281.116220] [<f7ba90a5>] rt2800pci_set_device_state+0xd5/0x13b > [rt2800pci] > [23281.116249] [<f7bcdc82>] rt2800_config_ps.isra.19+0x82/0xe0 [rt2800lib] > [23281.116282] [<f7bbf5c1>] rt2x00lib_config+0xd1/0x280 [rt2x00lib] > [23281.116318] [<f7bbec56>] rt2x00mac_config+0x36/0x80 [rt2x00lib] > [23281.116360] [<f8201fb0>] ieee80211_hw_config+0xc0/0x130 [mac80211] > [23281.116397] [<f820ca7c>] ieee80211_dynamic_ps_enable_work+0x18c/0x280 > [mac80211] > [23281.116493] [<c0262f5e>] process_one_work+0xee/0x400 > [23281.116507] [<c026356e>] worker_thread+0x11e/0x2c0 > [23281.116520] [<c0266d19>] kthread+0x69/0x70 > [23281.116534] [<c070d3e6>] kernel_thread_helper+0x6/0xd This is a bug in the rt2800pci powersave code, the device is woken up in a tasklet while the MCU request needs to sleep. A workaround is to disable PS. Hopefully I can work on a fix soon ... Helmut -- 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
