musb error: keyboard and mouse freezes.


I am using usb hub and connected usb keyboard,mouse and usb webcam.

When i open and close the webcam application, say for 5 times. i get strange results.

the webcam application is working. but the keyboard and mouse got freezed.

after some time, these messages appear on the console.

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WARNING: at drivers/usb/musb/musb_host.c:128 musb_h_tx_flush_fifo+0x94/0xd4()
Could not flush host TX0 fifo: csr: 000a
Modules linked in: gspca_main gspca_spca561
[] (dump_stack+0x0/0x14) from [] (warn_slowpath+0x60/0x7c)
[] (warn_slowpath+0x0/0x7c) from [] (musb_h_tx_flush_fifo+0x94/0xd4)
r3:00000000 r2:c03f1542
r6:ffffffff r5:0000000a r4:0000000a
[] (musb_h_tx_flush_fifo+0x0/0xd4) from [] (musb_cleanup_urb+0xc4/0x110)
r8:c7fb90e0 r7:d80ab100 r6:00000000 r5:00000000 r4:c79e19f0
[] (musb_cleanup_urb+0x0/0x110) from [] (musb_urb_dequeue+0x134/0x168)
[] (musb_urb_dequeue+0x0/0x168) from [] (unlink1+0xa4/0xb0)
[] (unlink1+0x0/0xb0) from [] (usb_hcd_unlink_urb+0x58/0x74)
r9:00000000 r8:c7a0dd04 r7:fffffffe r6:c7fb90e0 r5:a0000013
[] (usb_hcd_unlink_urb+0x0/0x74) from [] (usb_kill_urb+0x4c/0xec)
r7:000001f4 r6:c7fb90e0 r5:00000000 r4:00000000
[] (usb_kill_urb+0x0/0xec) from [] (usb_start_wait_urb+0x80/0xac)
r6:c7fb90e0 r5:00000000 r4:00000000
[] (usb_start_wait_urb+0x0/0xac) from [] (usb_control_msg+0xc8/0xec)
r8:00008112 r7:00000040 r6:0000000e r5:c7f7f560 r4:00000000
[] (usb_control_msg+0x0/0xec) from [] (reg_w_val+0x4c/0xa8)
[] (reg_w_val+0x0/0xa8) from [] (sd_stopN+0x30/0x34)
r6:c7edc3c0 r5:c7f07000 r4:c7f07000
[] (sd_stopN+0x0/0x34) from [] (gspca_stream_off+0x50/0x9c)

The only way is reboot the board.

Thanks and Regards,