[ath9k-devel] [BUG] Atheros AR7010+AR9287: Scheduling while atomic: ksoftirqd/0/3/0x00000302

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

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