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 m...@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 > _______________________________________________ > ath9k-devel mailing list > ath9k-devel@lists.ath9k.org > https://lists.ath9k.org/mailman/listinfo/ath9k-devel > -- Regards, Oleksij _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
