Re: Kernel oops when shutting down program using usb device

Philip Balister <philip@xxxxxxxxxxxx> · Wed, 16 Jul 2008 17:59:01 -0400

Alan Stern wrote:
On Wed, 16 Jul 2008, Philip Balister wrote:

The program streams data from the USRP (Universal Software Radio 
Peripheral) and calculates a transfer rate. It looks like the test 
completes and the program ooops as it is exiting.

Let me know if I can collect anything else. I am not much of a usb guy :(

Philip

root@beagleboard:~/gnuradio-3.1.2/usrp/host/apps# 
./test_usrp_standard_rx -D 200rx_overrun
eth0: set allmulti
eth0: set allmulti
eth0: set allmulti
eth0: set allmulti
xfered 1.34e+08 bytes in 116 seconds.  1.159e+06 bytes/sec.  cpu time = 
1.633
noverruns = 1
------------[ cut here ]------------
WARNING: at lib/kref.c:43 kref_get+0x28/0x44()

This is just a warning, not an oops.  Nevertheless, it should not 
happen.

What version of the kernel were you running?  On what hardware and
using which USB host controller driver?  Is the problem reproducible?

Doh, silly me for leaving out details ....

Beagle Board, OMAP3 based. Kernel is a fairly recent git + some patches. 
I can backtrack to an exact collection if necessary.

I ran the test program several times and the system hangs when the 
program ends. I do not think I get the warning message every time 
though, the system does hang every time.

Philip
Attachment:
smime.p7s

Description: S/MIME Cryptographic Signature