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[Discuss-gnuradio] failed to find urb in pending_rqsts: (nil)

From: Harald Welte
Subject: [Discuss-gnuradio] failed to find urb in pending_rqsts: (nil)
Date: Thu, 14 Apr 2005 22:08:27 +0200
User-agent: mutt-ng 1.5.8-r168i (Debian)


When running the 'test_usrp_standard_rx' or _tx programs contained in
the usrp-0.8 tarball, I get 

address@hidden/7 (21:54) 2.5/usrp-0.8/host/apps > ./test_usrp_standard_rx 
RX d'board A: Basic Rx
RX d'board B: TV Rx
fusb::pending_remove: failed to find urb in pending_rqsts: (nil)
zsh: 10309 segmentation fault  ./test_usrp_standard_rx

This is on a dual opteron 246, running debian-amd64 and a vanilla
2.6.12-rc2 kernel.

strace'ing the program, I get the following last lines:

ioctl(3, USBDEVFS_SUBMITURB, 0xd1c940)  = 0
ioctl(3, USBDEVFS_CONTROL, 0x7fffff800630) = 0
ioctl(3, USBDEVFS_CONTROL, 0x7fffff800670) = 4
getrusage(RUSAGE_SELF, {ru_utime={0, 6998}, ru_stime={0, 8998}, ...}) = 0
ioctl(3, USBDEVFS_REAPURBNDELAY, 0x7fffff7fc630) = -1 EAGAIN (Resource 
temporarily unavailable)
ioctl(3, USBDEVFS_REAPURB, 0x7fffff7fc630) = 0
write(2, "fusb::pending_remove: failed to "..., 65fusb::pending_remove: failed 
to find urb in pending_rqsts: (nil)) = 65

So it seems like the REAPURB ioctl returns a NULL-pointer and aborts.

Does anyone have an idea what's going on?

- Harald Welte <address@hidden>                         http://gnumonks.org/
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)

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