From mboxrd@z Thu Jan  1 00:00:00 1970
From: Oleksij Rempel <linux@rempel-privat.de>
Date: Thu, 23 Jan 2014 20:44:43 +0100
Subject: [ath9k-devel] [BUG] Atheros AR7010+AR9287: Scheduling while
 atomic: ksoftirqd/0/3/0x00000302
In-Reply-To: <trinity-b8018ef9-8037-4688-a363-2deb3aed68fc-1390501815918@3capp-1and1-bs02>
References: <trinity-b8018ef9-8037-4688-a363-2deb3aed68fc-1390501815918@3capp-1and1-bs02>
Message-ID: <52E1712B.70202@rempel-privat.de>
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To: ath9k-devel@lists.ath9k.org

Hi Antonio,

You probably know more about this issue then me.

Insight of this mutex are some WMI commands, which are incredible slow
on some USB 2.0 devices.

Am 23.01.2014 19:30, schrieb mail at fuerstflorian.de:
> Hello all,
> 
> my Raspberry Pi crashes about once a day with the following kernel message:
> 
> [80526.425663] wlan0: AP xx:xx:xx:xx:xx:xx changed bandwidth, new config is 2462 MHz, width 1 (2462/0 MHz)
> [80527.347296] wlan0: AP xx:xx:xx:xx:xx:xx changed bandwidth, new config is 2462 MHz, width 2 (2452/0 MHz)
> [80527.347683] BUG: scheduling while atomic: ksoftirqd/0/3/0x00000302
> [80527.421904] Modules linked in: arc4 ath9k_htc ath9k_common ath9k_hw ath mac80211 cfg80211 leds_gpio led_class spi_bcm2708 i2c_bcm2708 snd_bcm2835 snd_pcm snd_page_alloc snd_timer snd i2c_dev bcm2708_rng rng_core ipv6
> [80527.422023] CPU: 0 PID: 3 Comm: ksoftirqd/0 Tainted: G        W    3.10.26-1-ARCH #1
> [80527.422096] [<c0012da8>] (unwind_backtrace+0x0/0xf0) from [<c0010ca8>] (show_stack+0x10/0x14)
> [80527.422147] [<c0010ca8>] (show_stack+0x10/0x14) from [<c059ae08>] (__schedule_bug+0x44/0x5c)
> [80527.422182] [<c059ae08>] (__schedule_bug+0x44/0x5c) from [<c05a15f0>] (__schedule+0x54c/0x5c4)
> [80527.422213] [<c05a15f0>] (__schedule+0x54c/0x5c4) from [<c05a1d58>] (schedule_preempt_disabled+0x14/0x20)
> [80527.422242] [<c05a1d58>] (schedule_preempt_disabled+0x14/0x20) from [<c05a0994>] (__mutex_lock_slowpath+0x9c/0x12c)
> [80527.422337] [<c05a0994>] (__mutex_lock_slowpath+0x9c/0x12c) from [<bf2898cc>] (ath9k_htc_sta_rc_update+0x30/0x98 [ath9k_htc])
> [80527.422841] [<bf2898cc>] (ath9k_htc_sta_rc_update+0x30/0x98 [ath9k_htc]) from [<bf1863b0>] (ieee80211_rx_handlers+0x1994/0x24a4 [mac80211])
> [80527.423397] [<bf1863b0>] (ieee80211_rx_handlers+0x1994/0x24a4 [mac80211]) from [<bf1872e0>] (ieee80211_prepare_and_rx_handle+0x234/0xb14 [mac80211])
> [80527.423946] [<bf1872e0>] (ieee80211_prepare_and_rx_handle+0x234/0xb14 [mac80211]) from [<bf187eb8>] (ieee80211_rx+0x2f8/0x7ec [mac80211])
> [80527.424283] [<bf187eb8>] (ieee80211_rx+0x2f8/0x7ec [mac80211]) from [<bf28848c>] (ath9k_rx_tasklet+0x3b0/0x68c [ath9k_htc])
> [80527.424347] [<bf28848c>] (ath9k_rx_tasklet+0x3b0/0x68c [ath9k_htc]) from [<c002a94c>] (tasklet_action+0x5c/0xa8)
> [80527.424377] [<c002a94c>] (tasklet_action+0x5c/0xa8) from [<c002a0b8>] (__do_softirq+0xcc/0x278)
> [80527.424402] [<c002a0b8>] (__do_softirq+0xcc/0x278) from [<c002a290>] (run_ksoftirqd+0x2c/0x48)
> [80527.424437] [<c002a290>] (run_ksoftirqd+0x2c/0x48) from [<c004b74c>] (smpboot_thread_fn+0x15c/0x208)
> [80527.424475] [<c004b74c>] (smpboot_thread_fn+0x15c/0x208) from [<c0043d70>] (kthread+0xa4/0xb0)
> [80527.424510] [<c0043d70>] (kthread+0xa4/0xb0) from [<c000dc18>] (ret_from_fork+0x14/0x3c)
> 
> Some more information:
>   W-LAN Chipset: ID 0cf3:7015 Atheros Communications, Inc. TP-Link TL-WN821N v3 / TL-WN822N v2 802.11n [Atheros AR7010+AR9287]
>   Kernel: Linux pi1 3.10.27-2-ARCH #1 PREEMPT Tue Jan 21 00:42:16 MST 2014 armv6l GNU/Linux
>   
> Any suggestion?
> 
> Many thanks in advance. 
> Flo
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> 


-- 
Regards,
Oleksij