First, which distro are you using, and how old is the Linux image ? The
reason why I ask is that this problem is similar to several posts on this
group dating back to 2013 . . .

On Tue, Sep 22, 2015 at 6:32 PM, <[email protected]> wrote:

> Hi all,
>
> I'm having difficulty with my Beaglebone Black while trying to control a
> HackRF. The issue only ever comes up if I try to transmit something, which
> makes sense since it seems to be trying to flush the TX buffer.
>
> The device is connected to a powered USB hub, and works just fine from my
> desktop and laptop. I don't have another embedded device that I can try it
> on.
>
> I've seen some other posts about the same error, but I haven't found
> anything helpful or explanatory. Here's a post
> <https://www.nuand.com/forums/viewtopic.php?t=3709&p=6313>someone else
> made with the same issue, using a BladeRF. I've seen it pop up for other
> devices too, but I'm not getting anywhere close to finding a solution.
>
> Below is what dmesg is printing. It happens consistently any time that I
> try to transmit, and the entire bus seems to be dead once it happens (my
> WiFi dongle stops working too until I reboot). Does anyone have any insight
> or suggestions? This is a complete show-stopper for my project, in which
> I'd be using the HackRF to do some transmitting.
>
>
>> [  150.763241] ------------[ cut here ]------------
>>
>> [  150.767932] WARNING: CPU: 0 PID: 574 at
>> drivers/usb/musb/musb_host.c:128 musb_h_tx_flush_fifo+0x104/0x130()
>>
>> [  150.777711] Could not flush host TX2 fifo: csr: 0103
>>
>> [  150.782693] Modules linked in: ccm arc4 rtl8192cu rtl_usb
>> rtl8192c_common rtlwifi mac80211 cfg80211 omap_aes omap_sham omap_rng
>> rng_core tilcdc tda998x drm_kms_helper uio_pdrv_genirq uio sch_fq_codel
>> ip_tables x_tables
>>
>> [  150.802288] CPU: 0 PID: 574 Comm: fan.py Not tainted 4.2.0-1-ARCH #1
>>
>> [  150.808666] Hardware name: Generic AM33XX (Flattened Device Tree)
>>
>> [  150.814826] [<c001704c>] (unwind_backtrace) from [<c0014224>]
>> (show_stack+0x20/0x24)
>>
>> [  150.822617] [<c0014224>] (show_stack) from [<c08b4f58>]
>> (dump_stack+0x24/0x28)
>>
>> [  150.829881] [<c08b4f58>] (dump_stack) from [<c0049eb0>]
>> (warn_slowpath_common+0x94/0xc0)
>>
>> [  150.838010] [<c0049eb0>] (warn_slowpath_common) from [<c0049f1c>]
>> (warn_slowpath_fmt+0x40/0x48)
>>
>> [  150.846750] [<c0049f1c>] (warn_slowpath_fmt) from [<c066b938>]
>> (musb_h_tx_flush_fifo+0x104/0x130)
>>
>> [  150.855666] [<c066b938>] (musb_h_tx_flush_fifo) from [<c066d8a0>]
>> (musb_cleanup_urb.isra.7+0x60/0xf4)
>>
>> [  150.864929] [<c066d8a0>] (musb_cleanup_urb.isra.7) from [<c066dc04>]
>> (musb_urb_dequeue+0x170/0x1b0)
>>
>> [  150.874020] [<c066dc04>] (musb_urb_dequeue) from [<c0610b70>]
>> (unlink1+0x3c/0x124)
>>
>> [  150.881625] [<c0610b70>] (unlink1) from [<c0612d08>]
>> (usb_hcd_unlink_urb+0x74/0xd8)
>>
>> [  150.889318] [<c0612d08>] (usb_hcd_unlink_urb) from [<c0614248>]
>> (usb_kill_urb+0x68/0xe8)
>>
>> [  150.897448] [<c0614248>] (usb_kill_urb) from [<c062044c>]
>> (usbdev_ioctl+0x105c/0x18b0)
>>
>> [  150.905404] [<c062044c>] (usbdev_ioctl) from [<c0184fb8>]
>> (do_vfs_ioctl+0x3c8/0x5a8)
>>
>> [  150.913183] [<c0184fb8>] (do_vfs_ioctl) from [<c0185214>]
>> (SyS_ioctl+0x7c/0x8c)
>>
>> [  150.920525] [<c0185214>] (SyS_ioctl) from [<c00104e0>]
>> (ret_fast_syscall+0x0/0x3c)
>>
>> [  150.928125] ---[ end trace d9aef1845b59ce54 ]---
>>
>> [  151.937620] ------------[ cut here ]------------
>>
>> [  151.942311] WARNING: CPU: 0 PID: 157 at
>> drivers/usb/musb/musb_host.c:128 musb_h_tx_flush_fifo+0x104/0x130()
>>
>> [  151.952090] Could not flush host TX2 fifo: csr: 0103
>>
>> [  151.957071] Modules linked in: ccm arc4 rtl8192cu rtl_usb
>> rtl8192c_common rtlwifi mac80211 cfg80211 omap_aes omap_sham omap_rng
>> rng_core tilcdc tda998x drm_kms_helper uio_pdrv_genirq uio sch_fq_codel
>> ip_tables x_tables
>>
>> [  151.976663] CPU: 0 PID: 157 Comm: systemd-timesyn Tainted: G        W
>>       4.2.0-1-ARCH #1
>>
>> [  151.985045] Hardware name: Generic AM33XX (Flattened Device Tree)
>>
>> [  151.991198] [<c001704c>] (unwind_backtrace) from [<c0014224>]
>> (show_stack+0x20/0x24)
>>
>> [  151.998986] [<c0014224>] (show_stack) from [<c08b4f58>]
>> (dump_stack+0x24/0x28)
>>
>> [  152.006248] [<c08b4f58>] (dump_stack) from [<c0049eb0>]
>> (warn_slowpath_common+0x94/0xc0)
>>
>> [  152.014378] [<c0049eb0>] (warn_slowpath_common) from [<c0049f1c>]
>> (warn_slowpath_fmt+0x40/0x48)
>>
>> [  152.023117] [<c0049f1c>] (warn_slowpath_fmt) from [<c066b938>]
>> (musb_h_tx_flush_fifo+0x104/0x130)
>>
>> [  152.032031] [<c066b938>] (musb_h_tx_flush_fifo) from [<c066c880>]
>> (musb_start_urb+0x7f8/0xd14)
>>
>> [  152.040681] [<c066c880>] (musb_start_urb) from [<c066d5d4>]
>> (musb_urb_enqueue+0x364/0x5d0)
>>
>> [  152.048988] [<c066d5d4>] (musb_urb_enqueue) from [<c06123e8>]
>> (usb_hcd_submit_urb+0xd8/0x984)
>>
>> [  152.057555] [<c06123e8>] (usb_hcd_submit_urb) from [<c0614064>]
>> (usb_submit_urb+0x41c/0x598)
>>
>> [  152.066044] [<c0614064>] (usb_submit_urb) from [<bf213b04>]
>> (rtl_usb_tx+0x250/0x3d4 [rtl_usb])
>>
>> [  152.074746] [<bf213b04>] (rtl_usb_tx [rtl_usb]) from [<bf1f0c7c>]
>> (rtl_op_tx+0xac/0xb0 [rtlwifi])
>>
>> [  152.083932] [<bf1f0c7c>] (rtl_op_tx [rtlwifi]) from [<bf157e48>]
>> (ieee80211_tx_frags+0x168/0x398 [mac80211])
>>
>> [  152.093959] [<bf157e48>] (ieee80211_tx_frags [mac80211]) from
>> [<bf15810c>] (__ieee80211_tx+0x94/0x180 [mac80211])
>>
>> [  152.104407] [<bf15810c>] (__ieee80211_tx [mac80211]) from [<bf15a300>]
>> (ieee80211_tx+0xc4/0xf4 [mac80211])
>>
>> [  152.114243] [<bf15a300>] (ieee80211_tx [mac80211]) from [<bf15b924>]
>> (ieee80211_xmit+0xb0/0x110 [mac80211])
>>
>> [  152.124164] [<bf15b924>] (ieee80211_xmit [mac80211]) from [<bf15c710>]
>> (__ieee80211_subif_start_xmit+0x4c0/0x6a8 [mac80211])
>>
>> [  152.135570] [<bf15c710>] (__ieee80211_subif_start_xmit [mac80211])
>> from [<bf15c914>] (ieee80211_subif_start_xmit+0x1c/0x24 [mac80211])
>>
>> [  152.147784] [<bf15c914>] (ieee80211_subif_start_xmit [mac80211]) from
>> [<c078d334>] (dev_hard_start_xmit+0x250/0x394)
>>
>> [  152.158362] [<c078d334>] (dev_hard_start_xmit) from [<c07addd0>]
>> (sch_direct_xmit+0x114/0x1c8)
>>
>> [  152.167015] [<c07addd0>] (sch_direct_xmit) from [<c078d7d0>]
>> (__dev_queue_xmit+0x224/0x4fc)
>>
>> [  152.175402] [<c078d7d0>] (__dev_queue_xmit) from [<c078dac8>]
>> (dev_queue_xmit_sk+0x20/0x24)
>>
>> [  152.183791] [<c078dac8>] (dev_queue_xmit_sk) from [<c07c7be8>]
>> (ip_finish_output2+0x18c/0x408)
>>
>> [  152.192442] [<c07c7be8>] (ip_finish_output2) from [<c07c9b48>]
>> (ip_finish_output+0x154/0x1f8)
>>
>> [  152.201003] [<c07c9b48>] (ip_finish_output) from [<c07c9fc4>]
>> (ip_output+0xa4/0x10c)
>>
>> [  152.208781] [<c07c9fc4>] (ip_output) from [<c07c7850>]
>> (ip_local_out_sk+0x44/0x48)
>>
>> [  152.216384] [<c07c7850>] (ip_local_out_sk) from [<c07ca92c>]
>> (ip_send_skb+0x20/0x80)
>>
>> [  152.224169] [<c07ca92c>] (ip_send_skb) from [<c07f1a24>]
>> (udp_send_skb+0xf4/0x270)
>>
>> [  152.231776] [<c07f1a24>] (udp_send_skb) from [<c07f3818>]
>> (udp_sendmsg+0x2a4/0x7e4)
>>
>> [  152.239472] [<c07f3818>] (udp_sendmsg) from [<c07fdc9c>]
>> (inet_sendmsg+0x44/0x78)
>>
>> [  152.246990] [<c07fdc9c>] (inet_sendmsg) from [<c07710ec>]
>> (sock_sendmsg+0x44/0x54)
>>
>> [  152.254595] [<c07710ec>] (sock_sendmsg) from [<c0772588>]
>> (SyS_sendto+0xd8/0x114)
>>
>> [  152.262116] [<c0772588>] (SyS_sendto) from [<c00104e0>]
>> (ret_fast_syscall+0x0/0x3c)
>>
>> [  152.269803] ---[ end trace d9aef1845b59ce55 ]---
>>
>> [  162.924571] rtl_usb: reg 0x608, usbctrl_vendorreq TimeOut!
>> status:0xffffff92 value=0xd3c000
>>
>> [  172.919476] rtl_usb: reg 0x608, usbctrl_vendorreq TimeOut!
>> status:0xffffff92 value=0xd30000
>>
>> [  182.914417] rtl_usb: reg 0x608, usbctrl_vendorreq TimeOut!
>> status:0xffffff92 value=0xf0002ace
>>
>> [  192.909366] rtl_usb: reg 0x4fd, usbctrl_vendorreq TimeOut!
>> status:0xffffff92 value=0x69543421
>>
>
> --
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