On Wed, May 14, 2014 at 07:33:06AM +0000, Hans Petter Selasky wrote:
> Author: hselasky
> Date: Wed May 14 07:33:06 2014
> New Revision: 266006
> URL: http://svnweb.freebsd.org/changeset/base/266006
>
> Log:
> Change the USB audio kernel module linking order, so that the USB
> audio device driver is detached first and not its children. This fixes
> a panic in some cases when unloading "snd_uaudio" while a USB device
> is plugged. The linking order affects the order in which the module
> dependencies are registered.
The right way of specifying that uaudio should be registered last, i. e.
after other device drivers employing DRIVER_MODULE(), would be using:
DRIVER_MODULE_ORDER(uaudio, uhub, uaudio_driver, uaudio_devclass, NULL, NULL,
SI_ORDER_ANY);
instead of the existing DRIVER_MODULE() in uaudio.c.
Marius
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