Hello Felipe, > > > > I have a second issue with a functionfs USB-device implementation. > > > > The scenario is this: > > 1) USB-device app starts up, runs fine > > 2) ssh to the device, kill the app with CTRL-C > > 3) try to start the USB-device app 2nd time > > > > PANIC > > > > dmesg output: > > [ 2553.870000] ------------[ cut here ]------------ [ 2553.870000] > > kernel BUG at /var/lib/jenkins/workspace/Complete_PXYZ/.../kernel- > source/fs/sysfs/file.c:332! > > > > [ 2553.870000] Internal error: Oops - BUG: 0 [#1] PREEMPT ARM [ > > 2553.870000] Modules linked in: designware_udc usb_f_fs libcomposite > > udc_core fuse configfs autofs4 > > what is this designware_udc? We don't have that in mainline It is a driver for a very old ST Micro processor. I now believe it is the cause of the problem. The same user-space code for starting and stopping our USB function works on another platform. So now I must look at the source code for this old ST Micro processor and compare it to our other platform. Any hints about what to look for? Must be something to do with functionfs and starting and stopping, binding and unbinding? Andy -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
