cg 9c788987ab fix a panic triggerable by anyone with read/write access to the audio
devices.  opening /dev/{dsp,dspW,audio}0 and then opening a different device
from that list and closing it resulted in a panic when any operation is
performed on the first fd.

we prevent this happening by denying the second open unless it uses the same
minor device as the first.

PR:		kern/25519
2001-03-13 18:43:22 +00:00
..
2001-03-05 17:59:36 +00:00