I'm using an at91rm9200 with Linux 2.6.16. Under some unusual circumstances, I can create a failure.
Here is what I do to create the failure: * the device has both a USB device and a USB host port * the device has its USB device port configured as an ethernet gadget (g_ether) * connect the USB host port to the USB device port, "loopback" style * ifconfig usb1 <some IP address> * FTP into the device via ethernet * send the list "ls" command a few times and I get a crash like so: ----- SNIP ----- /root # at91_ohci at91_ohci: OHCI Unrecoverable Error, disabled at91_ohci at91_ohci: HC died; cleaning up irq23: nobody cared Pid: 322, comm: in.ftpd CPU: 0 pc : [<c0038af8>] lr : [<c0038c80>] Not tainted sp : c1f97f44 ip : c1f97f68 fp : c1f97f64 r10: c1f97fb0 r9 : c01df4a0 r8 : c01e7040 r7 : 0000000a r6 : c1f96000 r5 : c1f96000 r4 : 00000022 r3 : 20000013 r2 : 00000002 r1 : 00000001 r0 : 00000001 Flags: nzCv IRQs on FIQs on Mode SVC_32 Segment user Control: C000317F Table: 2165C000 DAC: 00000015 Function entered at [<c001fc14>] from [<c001ea54>] r4 = C1F97EFC Function entered at [<c001e9e8>] from [<c001ed74>] r5 = 00000017 r4 = C01DF94C Function entered at [<c001ecf4>] from [<c001ee04>] r6 = 00000017 r5 = C1F96000 r4 = FFFFFFFF Function entered at [<c001edb0>] from [<c001d998>] Function entered at [<c0038ab4>] from [<c0038c80>] r8 = 00000000 r7 = 00000001 r6 = 00000001 r5 = C1F96000 r4 = C1F96000 Function entered at [<c0038c3c>] from [<c001eed4>] r4 = FFFFFFFF Function entered at [<c001edb0>] from [<c001dbac>] handlers: [<c01188a8>] irq23: nobody cared ... repeats until the watchdog kicks in and resets the board ----- SNIP ----- The strange thing is that I can send files via FTP and change directories but the problem doesn't appear. Only when I send the list command. If I don't config usb1, the problem won't happen. i.e. "#config usb1 down" stops the problem. Is this an actual problem, or am I doing something really silly? I can easily avoid the situation where this bug/problem/craziness occurs but I thought that I'd at least report it. Why am I doing this? It's for a Production test. A simple loopback cable allows me to test the physical hardware of both USB ports by connecting only one cable and looking for: A) creation of directory /sys/class/net/usb1, and B) if /sys/class/net/usb0/carrier == 1 We currently use another device as a portable USB port tester, but Production would like it all self contained and to be field testable using an easy to obtain cable with built-in test software. regards, Aras Vaichas ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
