CVS commit: src/sys/dev/ic

["Stephen Borrill" <sborrill%netbsd.org@localhost>]

Module Name:    src
Committed By:   sborrill
Date:           Wed Mar 21 13:19:12 UTC 2012

Modified Files:
        src/sys/dev/ic: mfi.c

Log Message:
>From OpenBSD. Fixes a deadlock during autoconf.

scrub more fields in the ccb when returning them to the free list after
theyve been used, in particular the mfi header flags which has a bit
that specifies if a command should be completed via the interrupt path.

if we use a ccb during boot we set that bit, but it isnt necessarily
cleared by things that use it later on. this means a ccb we expected to
complete via an interrupt never actually generates an interrupt or appears
in the reply queue. this obviously stalls the io.


To generate a diff of this commit:
cvs rdiff -u -r1.36 -r1.37 src/sys/dev/ic/mfi.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.