USB reset fails when using a LimeSDR Mini on FreeBSD

[Gary Jennejohn]

On Fri, 3 Jul 2020 11:15:01 +0200
Hans Petter Selasky <hps at selasky.org> wrote:

> Hi,
> 
> On 2020-07-03 11:06, Tomasz CEDRO wrote:
> > +1 for user enabled actions like usb reset and kernel driver detach:-)
> > maybe based on a sysctl like usermount, i.e. usb_allow_user_device_reset
> > and usb_allow_user_kernel_driver_detach..?
> > 
> > One would allow user to reset a usb device. This is sometimes required to
> > restore device or change its configration.
> > 
> > Second would allow user for example to unload ucom driver that is attached
> > to a device which does not seem possible right now and causes problem with
> > i.e. pyOCD / some debug probes.  
> 
> Currently we use PRIV_DRIVER in the USB stack. Not sure how a user gets PRIV_DRIVER rights.
> 

With a few exceptions it looks like root permissions are required per default.  The
code is in /usr/src/sys/kern/kern_priv.c.

> Tomasz: Feel free to suggest a patch for this after testing.
> 


-- 
Gary Jennejohn