| Message ID | 20160815150028.7909-1-adi@adirat.com (mailing list archive) |
|---|---|
| State | Rejected |
| Delegated to: | Kalle Valo |
| Headers | show |
Adi Ratiu <adi@adirat.com> wrote: > commit cfda2d8e2314 ("ath9k: Fix beacon configuration for > addition/removal of interfaces") reworked beacon configs to happen at > IF changes and missed cases when NL80211_IFTYPE_STATION has no beacons > with the corresponding values iter_data.primary_beacon_vif == 0 and > iter_data.nbcnvifs == 0 in ath9k_calculate_summary_state(), thus > calling ath9k_beacon_config() with null and giving the below warning. > > Fix this by calling beacon config only when a beacon actually exists, > i.e. by checking iter_data.beacons which should be set only inside > ath9k_vif_iter_set_beacon() (the line "iter_data.beacons = true;" in > ath9k_calculate_summary_state() is a bug in above rework commit). > > [ 16.910537] ------------[ cut here ]------------ > [ 16.910549] WARNING: CPU: 2 PID: 6 at drivers/net/wireless/ath/ath9k/beacon.c:642 ath9k_beacon_config+0x12c/0x130 [ath9k] > [ 16.910551] Modules linked in: intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel hid_generic aesni_intel usbhid hid aes_x86_64 joydev mousedev arc4 lrw ath9k dell_laptop ath9k_common ath9k_hw ath mac80211 gf128mul glue_helper ablk_helper dell_smbios input_leds cryptd led_class snd_hda_codec_hdmi psmouse cfg80211 serio_raw atkbd snd_hda_codec_realtek libps2 rfkill r8169 sr_mod snd_hda_codec_generic dcdbas cdrom mii snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core i8042 snd_pcm snd_timer serio ac xhci_pci xhci_hcd battery i2c_i801 tpm_tis pcspkr tpm_tis_core evdev shpchp lpc_ich i2c_smbus tpm sch_fq_codel ip_tables x_tables > [ 16.910620] CPU: 2 PID: 6 Comm: kworker/u16:0 Not tainted 4.8.0-rc1-next-20160815-g118253a #1 > [ 16.910621] Hardware name: Dell Inc. Inspiron 3521/018DYG, BIOS A14 07/31/2015 > [ 16.910648] Workqueue: phy0 ieee80211_iface_work [mac80211] > [ 16.910652] 0000000000000000 ffff880159f13630 ffffffff813140f0 0000000000000000 > [ 16.910657] 0000000000000000 ffff880159f13670 ffffffff8106b22b 0000028200000202 > [ 16.910661] ffff880156bc1500 0000000000000000 ffff880153cc8018 ffff880153cc8018 > [ 16.910666] Call Trace: > [ 16.910674] [<ffffffff813140f0>] dump_stack+0x63/0x83 > [ 16.910678] [<ffffffff8106b22b>] __warn+0xcb/0xf0 > [ 16.910682] [<ffffffff8106b31d>] warn_slowpath_null+0x1d/0x20 > [ 16.910690] [<ffffffffa02fceec>] ath9k_beacon_config+0x12c/0x130 [ath9k] > [ 16.910696] [<ffffffffa03010f6>] ath9k_calculate_summary_state+0xf6/0x350 [ath9k] > [ 16.910703] [<ffffffffa0301b46>] ath9k_bss_info_changed+0x186/0x1a0 [ath9k] > [ 16.910720] [<ffffffffa025dd71>] ieee80211_bss_info_change_notify+0xb1/0x200 [mac80211] > [ 16.910737] [<ffffffffa02c088c>] ieee80211_assoc_success+0x677/0xdeb [mac80211] > [ 16.910746] [<ffffffff810adea2>] ? up+0x32/0x50 > [ 16.910751] [<ffffffff810bcf3b>] ? wake_up_klogd+0x3b/0x50 > [ 16.910755] [<ffffffff810bd489>] ? console_unlock+0x539/0x5f0 > [ 16.910760] [<ffffffff810bd794>] ? vprintk_emit+0x254/0x490 > [ 16.910765] [<ffffffff810bdb3f>] ? vprintk_default+0x1f/0x30 > [ 16.910769] [<ffffffff8114854d>] ? printk+0x48/0x50 > [ 16.910788] [<ffffffffa02ad0c2>] ieee80211_rx_mgmt_assoc_resp+0x152/0x4c0 [mac80211] > [ 16.910807] [<ffffffffa02ade3f>] ieee80211_sta_rx_queued_mgmt+0x18f/0x840 [mac80211] > [ 16.910813] [<ffffffff810d0a40>] ? lock_timer_base.isra.2+0x80/0xa0 > [ 16.910817] [<ffffffff810ad896>] ? cpuacct_charge+0x86/0xa0 > [ 16.910822] [<ffffffff8109d8e7>] ? update_curr+0xb7/0x160 > [ 16.910827] [<ffffffff8109e54c>] ? dequeue_entity+0x24c/0xa20 > [ 16.910831] [<ffffffff8109f2e3>] ? dequeue_task_fair+0x5c3/0x960 > [ 16.910848] [<ffffffffa02735b4>] ? ieee80211_iface_work+0xd4/0x410 [mac80211] > [ 16.910865] [<ffffffffa0273775>] ieee80211_iface_work+0x295/0x410 [mac80211] > [ 16.910870] [<ffffffff81090537>] ? finish_task_switch+0x77/0x1e0 > [ 16.910875] [<ffffffff810832d5>] process_one_work+0x1e5/0x470 > [ 16.910880] [<ffffffff810835a8>] worker_thread+0x48/0x4e0 > [ 16.910885] [<ffffffff81083560>] ? process_one_work+0x470/0x470 > [ 16.910888] [<ffffffff81088f09>] kthread+0xc9/0xe0 > [ 16.910894] [<ffffffff81028723>] ? __switch_to+0x2c3/0x610 > [ 16.910899] [<ffffffff8173a67f>] ret_from_fork+0x1f/0x40 > [ 16.910902] [<ffffffff81088e40>] ? kthread_create_on_node+0x40/0x40 > [ 16.910904] ---[ end trace aa169ad4461f2f18 ]--- > > Signed-off-by: Ioan-Adrian Ratiu <adi@adirat.com> Benjamin, does this look reasonable to you? I'm planning to queue this for 4.8.
Kalle Valo <kvalo@qca.qualcomm.com> writes: > Adi Ratiu <adi@adirat.com> wrote: >> commit cfda2d8e2314 ("ath9k: Fix beacon configuration for >> addition/removal of interfaces") reworked beacon configs to happen at >> IF changes and missed cases when NL80211_IFTYPE_STATION has no beacons >> with the corresponding values iter_data.primary_beacon_vif == 0 and >> iter_data.nbcnvifs == 0 in ath9k_calculate_summary_state(), thus >> calling ath9k_beacon_config() with null and giving the below warning. >> >> Fix this by calling beacon config only when a beacon actually exists, >> i.e. by checking iter_data.beacons which should be set only inside >> ath9k_vif_iter_set_beacon() (the line "iter_data.beacons = true;" in >> ath9k_calculate_summary_state() is a bug in above rework commit). >> >> [ 16.910537] ------------[ cut here ]------------ >> [ 16.910549] WARNING: CPU: 2 PID: 6 at drivers/net/wireless/ath/ath9k/beacon.c:642 ath9k_beacon_config+0x12c/0x130 [ath9k] >> [ 16.910551] Modules linked in: intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel hid_generic aesni_intel usbhid hid aes_x86_64 joydev mousedev arc4 lrw ath9k dell_laptop ath9k_common ath9k_hw ath mac80211 gf128mul glue_helper ablk_helper dell_smbios input_leds cryptd led_class snd_hda_codec_hdmi psmouse cfg80211 serio_raw atkbd snd_hda_codec_realtek libps2 rfkill r8169 sr_mod snd_hda_codec_generic dcdbas cdrom mii snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core i8042 snd_pcm snd_timer serio ac xhci_pci xhci_hcd battery i2c_i801 tpm_tis pcspkr tpm_tis_core evdev shpchp lpc_ich i2c_smbus tpm sch_fq_codel ip_tables x_tables >> [ 16.910620] CPU: 2 PID: 6 Comm: kworker/u16:0 Not tainted 4.8.0-rc1-next-20160815-g118253a #1 >> [ 16.910621] Hardware name: Dell Inc. Inspiron 3521/018DYG, BIOS A14 07/31/2015 >> [ 16.910648] Workqueue: phy0 ieee80211_iface_work [mac80211] >> [ 16.910652] 0000000000000000 ffff880159f13630 ffffffff813140f0 0000000000000000 >> [ 16.910657] 0000000000000000 ffff880159f13670 ffffffff8106b22b 0000028200000202 >> [ 16.910661] ffff880156bc1500 0000000000000000 ffff880153cc8018 ffff880153cc8018 >> [ 16.910666] Call Trace: >> [ 16.910674] [<ffffffff813140f0>] dump_stack+0x63/0x83 >> [ 16.910678] [<ffffffff8106b22b>] __warn+0xcb/0xf0 >> [ 16.910682] [<ffffffff8106b31d>] warn_slowpath_null+0x1d/0x20 >> [ 16.910690] [<ffffffffa02fceec>] ath9k_beacon_config+0x12c/0x130 [ath9k] >> [ 16.910696] [<ffffffffa03010f6>] ath9k_calculate_summary_state+0xf6/0x350 [ath9k] >> [ 16.910703] [<ffffffffa0301b46>] ath9k_bss_info_changed+0x186/0x1a0 [ath9k] >> [ 16.910720] [<ffffffffa025dd71>] ieee80211_bss_info_change_notify+0xb1/0x200 [mac80211] >> [ 16.910737] [<ffffffffa02c088c>] ieee80211_assoc_success+0x677/0xdeb [mac80211] >> [ 16.910746] [<ffffffff810adea2>] ? up+0x32/0x50 >> [ 16.910751] [<ffffffff810bcf3b>] ? wake_up_klogd+0x3b/0x50 >> [ 16.910755] [<ffffffff810bd489>] ? console_unlock+0x539/0x5f0 >> [ 16.910760] [<ffffffff810bd794>] ? vprintk_emit+0x254/0x490 >> [ 16.910765] [<ffffffff810bdb3f>] ? vprintk_default+0x1f/0x30 >> [ 16.910769] [<ffffffff8114854d>] ? printk+0x48/0x50 >> [ 16.910788] [<ffffffffa02ad0c2>] ieee80211_rx_mgmt_assoc_resp+0x152/0x4c0 [mac80211] >> [ 16.910807] [<ffffffffa02ade3f>] ieee80211_sta_rx_queued_mgmt+0x18f/0x840 [mac80211] >> [ 16.910813] [<ffffffff810d0a40>] ? lock_timer_base.isra.2+0x80/0xa0 >> [ 16.910817] [<ffffffff810ad896>] ? cpuacct_charge+0x86/0xa0 >> [ 16.910822] [<ffffffff8109d8e7>] ? update_curr+0xb7/0x160 >> [ 16.910827] [<ffffffff8109e54c>] ? dequeue_entity+0x24c/0xa20 >> [ 16.910831] [<ffffffff8109f2e3>] ? dequeue_task_fair+0x5c3/0x960 >> [ 16.910848] [<ffffffffa02735b4>] ? ieee80211_iface_work+0xd4/0x410 [mac80211] >> [ 16.910865] [<ffffffffa0273775>] ieee80211_iface_work+0x295/0x410 [mac80211] >> [ 16.910870] [<ffffffff81090537>] ? finish_task_switch+0x77/0x1e0 >> [ 16.910875] [<ffffffff810832d5>] process_one_work+0x1e5/0x470 >> [ 16.910880] [<ffffffff810835a8>] worker_thread+0x48/0x4e0 >> [ 16.910885] [<ffffffff81083560>] ? process_one_work+0x470/0x470 >> [ 16.910888] [<ffffffff81088f09>] kthread+0xc9/0xe0 >> [ 16.910894] [<ffffffff81028723>] ? __switch_to+0x2c3/0x610 >> [ 16.910899] [<ffffffff8173a67f>] ret_from_fork+0x1f/0x40 >> [ 16.910902] [<ffffffff81088e40>] ? kthread_create_on_node+0x40/0x40 >> [ 16.910904] ---[ end trace aa169ad4461f2f18 ]--- >> >> Signed-off-by: Ioan-Adrian Ratiu <adi@adirat.com> > > Benjamin, does this look reasonable to you? I'm planning to queue this for 4.8. Actually, I see two patches which might be related but not identical: ath9k: fix client mode beacon configuration https://patchwork.kernel.org/patch/9247699/ ath9k: Fix beacon configuration assertion failure https://patchwork.kernel.org/patch/9281191/ Felix (CCed) & Benjamin: please take a look and advice which one I should take.
Hi On Fri, 19 Aug 2016, Kalle Valo <kvalo@codeaurora.org> wrote: > Kalle Valo <kvalo@qca.qualcomm.com> writes: > >> Adi Ratiu <adi@adirat.com> wrote: >>> commit cfda2d8e2314 ("ath9k: Fix beacon configuration for >>> addition/removal of interfaces") reworked beacon configs to happen at >>> IF changes and missed cases when NL80211_IFTYPE_STATION has no beacons >>> with the corresponding values iter_data.primary_beacon_vif == 0 and >>> iter_data.nbcnvifs == 0 in ath9k_calculate_summary_state(), thus >>> calling ath9k_beacon_config() with null and giving the below warning. >>> >>> Fix this by calling beacon config only when a beacon actually exists, >>> i.e. by checking iter_data.beacons which should be set only inside >>> ath9k_vif_iter_set_beacon() (the line "iter_data.beacons = true;" in >>> ath9k_calculate_summary_state() is a bug in above rework commit). >>> >>> [ 16.910537] ------------[ cut here ]------------ >>> [ 16.910549] WARNING: CPU: 2 PID: 6 at drivers/net/wireless/ath/ath9k/beacon.c:642 ath9k_beacon_config+0x12c/0x130 [ath9k] >>> [ 16.910551] Modules linked in: intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel hid_generic aesni_intel usbhid hid aes_x86_64 joydev mousedev arc4 lrw ath9k dell_laptop ath9k_common ath9k_hw ath mac80211 gf128mul glue_helper ablk_helper dell_smbios input_leds cryptd led_class snd_hda_codec_hdmi psmouse cfg80211 serio_raw atkbd snd_hda_codec_realtek libps2 rfkill r8169 sr_mod snd_hda_codec_generic dcdbas cdrom mii snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core i8042 snd_pcm snd_timer serio ac xhci_pci xhci_hcd battery i2c_i801 tpm_tis pcspkr tpm_tis_core evdev shpchp lpc_ich i2c_smbus tpm sch_fq_codel ip_tables x_tables >>> [ 16.910620] CPU: 2 PID: 6 Comm: kworker/u16:0 Not tainted 4.8.0-rc1-next-20160815-g118253a #1 >>> [ 16.910621] Hardware name: Dell Inc. Inspiron 3521/018DYG, BIOS A14 07/31/2015 >>> [ 16.910648] Workqueue: phy0 ieee80211_iface_work [mac80211] >>> [ 16.910652] 0000000000000000 ffff880159f13630 ffffffff813140f0 0000000000000000 >>> [ 16.910657] 0000000000000000 ffff880159f13670 ffffffff8106b22b 0000028200000202 >>> [ 16.910661] ffff880156bc1500 0000000000000000 ffff880153cc8018 ffff880153cc8018 >>> [ 16.910666] Call Trace: >>> [ 16.910674] [<ffffffff813140f0>] dump_stack+0x63/0x83 >>> [ 16.910678] [<ffffffff8106b22b>] __warn+0xcb/0xf0 >>> [ 16.910682] [<ffffffff8106b31d>] warn_slowpath_null+0x1d/0x20 >>> [ 16.910690] [<ffffffffa02fceec>] ath9k_beacon_config+0x12c/0x130 [ath9k] >>> [ 16.910696] [<ffffffffa03010f6>] ath9k_calculate_summary_state+0xf6/0x350 [ath9k] >>> [ 16.910703] [<ffffffffa0301b46>] ath9k_bss_info_changed+0x186/0x1a0 [ath9k] >>> [ 16.910720] [<ffffffffa025dd71>] ieee80211_bss_info_change_notify+0xb1/0x200 [mac80211] >>> [ 16.910737] [<ffffffffa02c088c>] ieee80211_assoc_success+0x677/0xdeb [mac80211] >>> [ 16.910746] [<ffffffff810adea2>] ? up+0x32/0x50 >>> [ 16.910751] [<ffffffff810bcf3b>] ? wake_up_klogd+0x3b/0x50 >>> [ 16.910755] [<ffffffff810bd489>] ? console_unlock+0x539/0x5f0 >>> [ 16.910760] [<ffffffff810bd794>] ? vprintk_emit+0x254/0x490 >>> [ 16.910765] [<ffffffff810bdb3f>] ? vprintk_default+0x1f/0x30 >>> [ 16.910769] [<ffffffff8114854d>] ? printk+0x48/0x50 >>> [ 16.910788] [<ffffffffa02ad0c2>] ieee80211_rx_mgmt_assoc_resp+0x152/0x4c0 [mac80211] >>> [ 16.910807] [<ffffffffa02ade3f>] ieee80211_sta_rx_queued_mgmt+0x18f/0x840 [mac80211] >>> [ 16.910813] [<ffffffff810d0a40>] ? lock_timer_base.isra.2+0x80/0xa0 >>> [ 16.910817] [<ffffffff810ad896>] ? cpuacct_charge+0x86/0xa0 >>> [ 16.910822] [<ffffffff8109d8e7>] ? update_curr+0xb7/0x160 >>> [ 16.910827] [<ffffffff8109e54c>] ? dequeue_entity+0x24c/0xa20 >>> [ 16.910831] [<ffffffff8109f2e3>] ? dequeue_task_fair+0x5c3/0x960 >>> [ 16.910848] [<ffffffffa02735b4>] ? ieee80211_iface_work+0xd4/0x410 [mac80211] >>> [ 16.910865] [<ffffffffa0273775>] ieee80211_iface_work+0x295/0x410 [mac80211] >>> [ 16.910870] [<ffffffff81090537>] ? finish_task_switch+0x77/0x1e0 >>> [ 16.910875] [<ffffffff810832d5>] process_one_work+0x1e5/0x470 >>> [ 16.910880] [<ffffffff810835a8>] worker_thread+0x48/0x4e0 >>> [ 16.910885] [<ffffffff81083560>] ? process_one_work+0x470/0x470 >>> [ 16.910888] [<ffffffff81088f09>] kthread+0xc9/0xe0 >>> [ 16.910894] [<ffffffff81028723>] ? __switch_to+0x2c3/0x610 >>> [ 16.910899] [<ffffffff8173a67f>] ret_from_fork+0x1f/0x40 >>> [ 16.910902] [<ffffffff81088e40>] ? kthread_create_on_node+0x40/0x40 >>> [ 16.910904] ---[ end trace aa169ad4461f2f18 ]--- >>> >>> Signed-off-by: Ioan-Adrian Ratiu <adi@adirat.com> >> >> Benjamin, does this look reasonable to you? I'm planning to queue this for 4.8. > > Actually, I see two patches which might be related but not identical: > > ath9k: fix client mode beacon configuration > https://patchwork.kernel.org/patch/9247699/ > > ath9k: Fix beacon configuration assertion failure > https://patchwork.kernel.org/patch/9281191/ Definitely we're touching the same logic and I'm leaning in the direction of dropping my patch and using Felix's. I can't test the other patch right noum though because I'm on vacantion. I'll test next week and report back. > > Felix (CCed) & Benjamin: please take a look and advice which one I > should take. > > -- > Kalle Valo
On Fr, 2016-08-19 at 13:03 +0300, Kalle Valo wrote: > Actually, I see two patches which might be related but not identical: > > ath9k: fix client mode beacon configuration > https://patchwork.kernel.org/patch/9247699/ > > ath9k: Fix beacon configuration assertion failure > https://patchwork.kernel.org/patch/9281191/ > > Felix (CCed) & Benjamin: please take a look and advice which one I > should take. Yes, both patches are designed to fix the same issue in my patch. Felix solution looks entirely correct to me, the second solution seems slightly wrong because it prevents the call to ath9k_beacon_config from happening instead of ensuring the correct parameter value. ath9k_beacon_config needs to be called even if iter_data.beacons is false as it disables the interrupts. Benjamin
Benjamin Berg <benjamin.berg@open-mesh.com> writes: > On Fr, 2016-08-19 at 13:03 +0300, Kalle Valo wrote: >> Actually, I see two patches which might be related but not identical: >> >> ath9k: fix client mode beacon configuration >> https://patchwork.kernel.org/patch/9247699/ >> >> ath9k: Fix beacon configuration assertion failure >> https://patchwork.kernel.org/patch/9281191/ >> >> Felix (CCed) & Benjamin: please take a look and advice which one I >> should take. > > Yes, both patches are designed to fix the same issue in my patch. > > Felix solution looks entirely correct to me, the second solution seems > slightly wrong because it prevents the call to ath9k_beacon_config from > happening instead of ensuring the correct parameter value. > ath9k_beacon_config needs to be called even if iter_data.beacons is > false as it disables the interrupts. Ok, I'll the patch from Felix then. Thanks.
On Mon, 22 Aug 2016, Kalle Valo <kvalo@codeaurora.org> wrote: > Benjamin Berg <benjamin.berg@open-mesh.com> writes: > >> On Fr, 2016-08-19 at 13:03 +0300, Kalle Valo wrote: >>> Actually, I see two patches which might be related but not identical: >>> >>> ath9k: fix client mode beacon configuration >>> https://patchwork.kernel.org/patch/9247699/ >>> >>> ath9k: Fix beacon configuration assertion failure >>> https://patchwork.kernel.org/patch/9281191/ >>> >>> Felix (CCed) & Benjamin: please take a look and advice which one I >>> should take. >> >> Yes, both patches are designed to fix the same issue in my patch. >> >> Felix solution looks entirely correct to me, the second solution seems >> slightly wrong because it prevents the call to ath9k_beacon_config from >> happening instead of ensuring the correct parameter value. >> ath9k_beacon_config needs to be called even if iter_data.beacons is >> false as it disables the interrupts. > > Ok, I'll the patch from Felix then. Thanks. Tested Felix patch. Confirm it works great. Thanks! > > -- > Kalle Valo
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index a394622..3c6f413 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -1154,7 +1154,6 @@ void ath9k_calculate_summary_state(struct ath_softc *sc, bool changed = (iter_data.primary_sta != ctx->primary_sta); if (iter_data.primary_sta) { - iter_data.beacons = true; ath9k_set_assoc_state(sc, iter_data.primary_sta, changed); ctx->primary_sta = iter_data.primary_sta; @@ -1166,10 +1165,12 @@ void ath9k_calculate_summary_state(struct ath_softc *sc, if (ath9k_hw_mci_is_enabled(sc->sc_ah)) ath9k_mci_update_wlan_channels(sc, true); } + } else if (iter_data.beacons) { + sc->nbcnvifs = iter_data.nbcnvifs; + ath9k_beacon_config(sc, iter_data.primary_beacon_vif, + iter_data.beacons); } - sc->nbcnvifs = iter_data.nbcnvifs; - ath9k_beacon_config(sc, iter_data.primary_beacon_vif, - iter_data.beacons); + ath9k_hw_set_interrupts(ah); if (ah->slottime != iter_data.slottime) {
commit cfda2d8e2314 ("ath9k: Fix beacon configuration for addition/removal of interfaces") reworked beacon configs to happen at IF changes and missed cases when NL80211_IFTYPE_STATION has no beacons with the corresponding values iter_data.primary_beacon_vif == 0 and iter_data.nbcnvifs == 0 in ath9k_calculate_summary_state(), thus calling ath9k_beacon_config() with null and giving the below warning. Fix this by calling beacon config only when a beacon actually exists, i.e. by checking iter_data.beacons which should be set only inside ath9k_vif_iter_set_beacon() (the line "iter_data.beacons = true;" in ath9k_calculate_summary_state() is a bug in above rework commit). [ 16.910537] ------------[ cut here ]------------ [ 16.910549] WARNING: CPU: 2 PID: 6 at drivers/net/wireless/ath/ath9k/beacon.c:642 ath9k_beacon_config+0x12c/0x130 [ath9k] [ 16.910551] Modules linked in: intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel hid_generic aesni_intel usbhid hid aes_x86_64 joydev mousedev arc4 lrw ath9k dell_laptop ath9k_common ath9k_hw ath mac80211 gf128mul glue_helper ablk_helper dell_smbios input_leds cryptd led_class snd_hda_codec_hdmi psmouse cfg80211 serio_raw atkbd snd_hda_codec_realtek libps2 rfkill r8169 sr_mod snd_hda_codec_generic dcdbas cdrom mii snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core i8042 snd_pcm snd_timer serio ac xhci_pci xhci_hcd battery i2c_i801 tpm_tis pcspkr tpm_tis_core evdev shpchp lpc_ich i2c_smbus tpm sch_fq_codel ip_tables x_tables [ 16.910620] CPU: 2 PID: 6 Comm: kworker/u16:0 Not tainted 4.8.0-rc1-next-20160815-g118253a #1 [ 16.910621] Hardware name: Dell Inc. Inspiron 3521/018DYG, BIOS A14 07/31/2015 [ 16.910648] Workqueue: phy0 ieee80211_iface_work [mac80211] [ 16.910652] 0000000000000000 ffff880159f13630 ffffffff813140f0 0000000000000000 [ 16.910657] 0000000000000000 ffff880159f13670 ffffffff8106b22b 0000028200000202 [ 16.910661] ffff880156bc1500 0000000000000000 ffff880153cc8018 ffff880153cc8018 [ 16.910666] Call Trace: [ 16.910674] [<ffffffff813140f0>] dump_stack+0x63/0x83 [ 16.910678] [<ffffffff8106b22b>] __warn+0xcb/0xf0 [ 16.910682] [<ffffffff8106b31d>] warn_slowpath_null+0x1d/0x20 [ 16.910690] [<ffffffffa02fceec>] ath9k_beacon_config+0x12c/0x130 [ath9k] [ 16.910696] [<ffffffffa03010f6>] ath9k_calculate_summary_state+0xf6/0x350 [ath9k] [ 16.910703] [<ffffffffa0301b46>] ath9k_bss_info_changed+0x186/0x1a0 [ath9k] [ 16.910720] [<ffffffffa025dd71>] ieee80211_bss_info_change_notify+0xb1/0x200 [mac80211] [ 16.910737] [<ffffffffa02c088c>] ieee80211_assoc_success+0x677/0xdeb [mac80211] [ 16.910746] [<ffffffff810adea2>] ? up+0x32/0x50 [ 16.910751] [<ffffffff810bcf3b>] ? wake_up_klogd+0x3b/0x50 [ 16.910755] [<ffffffff810bd489>] ? console_unlock+0x539/0x5f0 [ 16.910760] [<ffffffff810bd794>] ? vprintk_emit+0x254/0x490 [ 16.910765] [<ffffffff810bdb3f>] ? vprintk_default+0x1f/0x30 [ 16.910769] [<ffffffff8114854d>] ? printk+0x48/0x50 [ 16.910788] [<ffffffffa02ad0c2>] ieee80211_rx_mgmt_assoc_resp+0x152/0x4c0 [mac80211] [ 16.910807] [<ffffffffa02ade3f>] ieee80211_sta_rx_queued_mgmt+0x18f/0x840 [mac80211] [ 16.910813] [<ffffffff810d0a40>] ? lock_timer_base.isra.2+0x80/0xa0 [ 16.910817] [<ffffffff810ad896>] ? cpuacct_charge+0x86/0xa0 [ 16.910822] [<ffffffff8109d8e7>] ? update_curr+0xb7/0x160 [ 16.910827] [<ffffffff8109e54c>] ? dequeue_entity+0x24c/0xa20 [ 16.910831] [<ffffffff8109f2e3>] ? dequeue_task_fair+0x5c3/0x960 [ 16.910848] [<ffffffffa02735b4>] ? ieee80211_iface_work+0xd4/0x410 [mac80211] [ 16.910865] [<ffffffffa0273775>] ieee80211_iface_work+0x295/0x410 [mac80211] [ 16.910870] [<ffffffff81090537>] ? finish_task_switch+0x77/0x1e0 [ 16.910875] [<ffffffff810832d5>] process_one_work+0x1e5/0x470 [ 16.910880] [<ffffffff810835a8>] worker_thread+0x48/0x4e0 [ 16.910885] [<ffffffff81083560>] ? process_one_work+0x470/0x470 [ 16.910888] [<ffffffff81088f09>] kthread+0xc9/0xe0 [ 16.910894] [<ffffffff81028723>] ? __switch_to+0x2c3/0x610 [ 16.910899] [<ffffffff8173a67f>] ret_from_fork+0x1f/0x40 [ 16.910902] [<ffffffff81088e40>] ? kthread_create_on_node+0x40/0x40 [ 16.910904] ---[ end trace aa169ad4461f2f18 ]--- Signed-off-by: Ioan-Adrian Ratiu <adi@adirat.com> --- drivers/net/wireless/ath/ath9k/main.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)