D58677.1794765430.diff
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	diff --git a/sys/dev/netmap/netmap_freebsd.c b/sys/dev/netmap/netmap_freebsd.c
	--- a/sys/dev/netmap/netmap_freebsd.c
	+++ b/sys/dev/netmap/netmap_freebsd.c
	@@ -1452,24 +1452,24 @@

	if (ev != EVFILT_READ && ev != EVFILT_WRITE) {
	nm_prerr("bad filter request %d", ev);
	- return 1;
	+ return EINVAL;
	}
	error = devfs_get_cdevpriv((void**)&priv);
	if (error) {
	nm_prerr("device not yet setup");
	- return 1;
	+ return error;
	}
	+ NMG_LOCK();
	na = priv->np_na;
	if (na == NULL) {
	+ NMG_UNLOCK();
	nm_prerr("no netmap adapter for this file descriptor");
	- return 1;
	+ return ENOENT;
	}
	/* the si is indicated in the priv */
	si = priv->np_si[(ev == EVFILT_WRITE) ? NR_TX : NR_RX];
	- kn->kn_fop = (ev == EVFILT_WRITE) ?
	- &netmap_wfiltops : &netmap_rfiltops;
	+ kn->kn_fop = (ev == EVFILT_WRITE) ? &netmap_wfiltops : &netmap_rfiltops;
	kn->kn_hook = priv;
	- NMG_LOCK();
	si->kqueue_users++;
	nm_prinf("kqueue users for %s: %d", si->mtxname, si->kqueue_users);
	NMG_UNLOCK();