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-rw-r--r--sys/geom/geom_subr.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/geom/geom_subr.c b/sys/geom/geom_subr.c
index b6a9c7f..69a972d 100644
--- a/sys/geom/geom_subr.c
+++ b/sys/geom/geom_subr.c
@@ -627,6 +627,9 @@ g_access(struct g_consumer *cp, int dcr, int dcw, int dce)
/* Ok then... */
error = pp->geom->access(pp, dcr, dcw, dce);
+ KASSERT(dcr > 0 || dcw > 0 || dce > 0 || error == 0,
+ ("Geom provider %s::%s failed closing ->access()",
+ pp->geom->class->name, pp->name));
if (!error) {
/*
* If we open first write, spoil any partner consumers.
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