git: DragonFly_RELEASE_4_2 bus: Clear device description when we set driver.

[Sepherosa Ziehau]

commit 3d88cc7897f143cdab626afabf155211959e96b5
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Mon Jul 13 10:59:09 2015 +0800

    bus: Clear device description when we set driver.
    
    This fixes several places that driver is detached, but device desc set
    by driver is not cleared, e.g. module unload.
    
    Minor cleanup, while I'm here.
    
    Reported-by: swildner@

Summary of changes:
 sys/kern/subr_bus.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/3d88cc7897f143cdab626afabf155211959e96b5


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