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Don't probe for a disk unless explicitly enabled by a tunable.

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This allows boot to proceed on a real system until the issue
of calling back into certain OpenFirmware calls (e.g. finddevice)
in thread context is understood.

(this commit only affects psim users, of which I think I am the
only one...)
This commit is contained in:
Peter Grehan 2004-12-28 05:07:49 +00:00
parent efd3a489a7
commit b8e106eadd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=139372
1 changed files with 6 additions and 0 deletions
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6
sys/dev/ofw/ofw_disk.c
View file

@ -73,6 +73,9 @@ struct g_class g_ofwd_class = {
DECLARE_GEOM_CLASS(g_ofwd_class, g_ofwd);
static int ofwd_enable = 0;
TUNABLE_INT("kern.ofw.disk", &ofwd_enable);
static int
ofwd_startio(struct ofwd_softc *sc, struct bio *bp)
{
@ -139,6 +142,9 @@ g_ofwd_init(struct g_class *mp __unused)
ihandle_t ifd;
int error;
if (ofwd_enable == 0)
return;
ofd = OF_finddevice("ofwdisk");
if (ofd == -1)
return;