Wireless Connectivity Cape with beaglebone black

[Gokulraj]

Hi All,

I have purchased Wireless Connectivity Cape for beaglebone black from element14 https://www.element14.com/wcc.  I'm finding difficult in making this cape work with beaglebone black with latest debian Debian 9.5 2018-10-07 4GB SD IoT . And after changing dtb to dtb=am335x-boneblack-wl1835mod.dtb. Now able to get the wlan0 interface. But, while trying to ifconfig wlan0 up the wlan0 interface makes the device to stall. I'm getting following message and kernel panic. Any support regrading this will be helpful. Attached uEnv.txt and kernel log.

Error Received:

        sudo ifconfig wlan0 up

[ 197.484089] wlcore: PHY firmware version: Rev 8.2.0.0.236
[ 197.531079] wlcore: firmware booted (Rev 8.9.0.0.69)
[ 218.555474] INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 218.561193] (detected by 0, t=5252 jiffies, g=5539, c=5538, q=0)
[ 218.567329] All QSes seen, last rcu_preempt kthread activity 5252 (-20361--25613), jiffies_till_next_fqs=1, root ->qsmask 0x0
[ 218.578685] ifconfig R running task 0 638 637 0x00000004
[ 218.585826] [<c0113910>] (unwind_backtrace) from [<c010deb8>] (show_stack+0x20/0x24)
[ 218.593626] [<c010deb8>] (show_stack) from [<c016dc90>] (sched_show_task.part.27+0xd8/0x108)
[ 218.602116] [<c016dc90>] (sched_show_task.part.27) from [<c0173d60>] (sched_show_task+0x24/0x28)
[ 218.610961] [<c0173d60>] (sched_show_task) from [<c01be728>] (rcu_check_callbacks+0xa34/0xb34)
[ 218.619628] [<c01be728>] (rcu_check_callbacks) from [<c01c66ac>] (update_process_times+0x44/0x6c)
[ 218.628560] [<c01c66ac>] (update_process_times) from [<c01da050>] (tick_sched_handle+0x64/0x70)
[ 218.637308] [<c01da050>] (tick_sched_handle) from [<c01da278>] (tick_sched_timer+0x5c/0xb8)
[ 218.645705] [<c01da278>] (tick_sched_timer) from [<c01c7b1c>] (__hrtimer_run_queues+0x15c/0x398)
[ 218.654537] [<c01c7b1c>] (__hrtimer_run_queues) from [<c01c8010>] (hrtimer_interrupt+0xc4/0x214)
[ 218.663378] [<c01c8010>] (hrtimer_interrupt) from [<c0129df0>] (omap2_gp_timer_interrupt+0x38/0x40)
[ 218.672477] [<c0129df0>] (omap2_gp_timer_interrupt) from [<c01aba38>] (__handle_irq_event_percpu+0xbc/0x280)
[ 218.682357] [<c01aba38>] (__handle_irq_event_percpu) from [<c01abc38>] (handle_irq_event_percpu+0x3c/0x8c)
[ 218.692060] [<c01abc38>] (handle_irq_event_percpu) from [<c01abcd0>] (handle_irq_event+0x48/0x6c)
[ 218.700981] [<c01abcd0>] (handle_irq_event) from [<c01afb80>] (handle_level_irq+0xd0/0x14c)
[ 218.709378] [<c01afb80>] (handle_level_irq) from [<c01aaaf8>] (generic_handle_irq+0x34/0x44)
[ 218.717861] [<c01aaaf8>] (generic_handle_irq) from [<c01ab10c>] (__handle_domain_irq+0x8c/0xfc)
[ 218.726606] [<c01ab10c>] (__handle_domain_irq) from [<c0101538>] (omap_intc_handle_irq+0x44/0xa0)
[ 218.735534] [<c0101538>] (omap_intc_handle_irq) from [<c0dabfcc>] (__irq_svc+0x6c/0xa8)
[ 218.743575] Exception stack(0xdabdd9b0 to 0xdabdd9f8)
[ 218.748654] d9a0: 00000000 ffffe000 c162edc0 00000000
[ 218.756875] d9c0: ffffe000 c162edc0 00000014 00000000 00000001 dc0b9400 00000040 dabdda5c
[ 218.765093] d9e0: dabdd9f0 dabdda00 c07ab65c c01016d0 20070113 ffffffff
[ 218.771746] [<c0dabfcc>] (__irq_svc) from [<c01016d0>] (__do_softirq+0xb0/0x3b8)
[ 218.779188] [<c01016d0>] (__do_softirq) from [<c0146cbc>] (irq_exit+0xe4/0x120)
[ 218.786539] [<c0146cbc>] (irq_exit) from [<c01ab110>] (__handle_domain_irq+0x90/0xfc)
[ 218.794411] [<c01ab110>] (__handle_domain_irq) from [<c0101538>] (omap_intc_handle_irq+0x44/0xa0)
[ 218.803328] [<c0101538>] (omap_intc_handle_irq) from [<c0dabfcc>] (__irq_svc+0x6c/0xa8)
[ 218.811368] Exception stack(0xdabddac0 to 0xdabddb08)
[ 218.816449] dac0: 00000001 1e45e000 db3eb480 00001231 df934700 da9d7000 db3eb480 c1505434
[ 218.824669] dae0: db44de00 00000002 c0da5ac8 dabddb1c dabddb20 dabddb10 c016d074 c0dab928
[ 218.832883] db00: 60070113 ffffffff
[ 218.836395] [<c0dabfcc>] (__irq_svc) from [<c0dab928>] (_raw_spin_unlock_irq+0x34/0x64)
[ 218.844444] [<c0dab928>] (_raw_spin_unlock_irq) from [<c016d074>] (finish_task_switch+0x90/0x224)
[ 218.853376] [<c016d074>] (finish_task_switch) from [<c0da5ac8>] (__schedule+0x340/0xa1c)
[ 218.861512] [<c0da5ac8>] (__schedule) from [<c0da64a0>] (preempt_schedule_common+0x3c/0x8c)
[ 218.869906] [<c0da64a0>] (preempt_schedule_common) from [<c0da650c>] (preempt_schedule.part.19+0x1c/0x20)
[ 218.879522] [<c0da650c>] (preempt_schedule.part.19) from [<c0da6538>] (preempt_schedule+0x28/0x2c)
[ 218.888528] [<c0da6538>] (preempt_schedule) from [<c0dab8f0>] (_raw_spin_unlock_irqrestore+0x60/0x64)
[ 218.897799] [<c0dab8f0>] (_raw_spin_unlock_irqrestore) from [<c0170e9c>] (try_to_wake_up+0x21c/0x460)
[ 218.907069] [<c0170e9c>] (try_to_wake_up) from [<c017116c>] (wake_up_q+0x68/0xac)
[ 218.914594] [<c017116c>] (wake_up_q) from [<c0da802c>] (__mutex_unlock_slowpath.constprop.3+0x144/0x160)
[ 218.924124] [<c0da802c>] (__mutex_unlock_slowpath.constprop.3) from [<c0da809c>] (mutex_unlock+0x54/0x58)
[ 218.934035] [<c0da809c>] (mutex_unlock) from [<bf23bcc0>] (wl1271_op_add_interface+0xd8/0x984 [wlcore])
[ 218.944222] [<bf23bcc0>] (wl1271_op_add_interface [wlcore]) from [<bf160d5c>] (drv_add_interface+0x4c/0x200 [mac80211])
[ 218.955571] [<bf160d5c>] (drv_add_interface [mac80211]) from [<bf178af0>] (ieee80211_do_open+0x47c/0x98c [mac80211])
[ 218.966524] [<bf178af0>] (ieee80211_do_open [mac80211]) from [<bf179060>] (ieee80211_open+0x60/0x64 [mac80211])
[ 218.976853] [<bf179060>] (ieee80211_open [mac80211]) from [<c0c09cf4>] (__dev_open+0xe4/0x15c)
[ 218.985514] [<c0c09cf4>] (__dev_open) from [<c0c0a108>] (__dev_change_flags+0x1a4/0x1d0)
[ 218.993649] [<c0c0a108>] (__dev_change_flags) from [<c0c0a15c>] (dev_change_flags+0x28/0x58)
[ 219.002140] [<c0c0a15c>] (dev_change_flags) from [<c0cb1efc>] (devinet_ioctl+0x704/0x7cc)
[ 219.010367] [<c0cb1efc>] (devinet_ioctl) from [<c0cb4568>] (inet_ioctl+0x1a4/0x1d0)
[ 219.018075] [<c0cb4568>] (inet_ioctl) from [<c0be1fe4>] (sock_ioctl+0x15c/0x300)
[ 219.025516] [<c0be1fe4>] (sock_ioctl) from [<c030dcc4>] (do_vfs_ioctl+0xc0/0x94c)
[ 219.033039] [<c030dcc4>] (do_vfs_ioctl) from [<c030e5cc>] (SyS_ioctl+0x7c/0x8c)
[ 219.040396] [<c030e5cc>] (SyS_ioctl) from [<c0108f00>] (ret_fast_syscall+0x0/0x54)
[ 219.048010] rcu_preempt kthread starved for 5252 jiffies! g5539 c5538 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
[ 219.058318] rcu_preempt R running task 0 8 2 0x00000000
[ 219.065433] [<c0da5ac4>] (__schedule) from [<c0da61fc>] (schedule+0x58/0xb8)
[ 219.072525] [<c0da61fc>] (schedule) from [<c0daa338>] (schedule_timeout+0x1d8/0x47c)
[ 219.080319] [<c0daa338>] (schedule_timeout) from [<c01bd3ac>] (rcu_gp_kthread+0x6b8/0xa04)
[ 219.088636] [<c01bd3ac>] (rcu_gp_kthread) from [<c0163e20>] (kthread+0x144/0x174)
[ 219.096163] [<c0163e20>] (kthread) from [<c0108fe8>] (ret_from_fork+0x14/0x2c)

Regards,

Gokulraj K.