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net: Revert vnet/epair cleanup race mitigation

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Revert the mitigation code for the vnet/epair cleanup race (done in r365457).
r368237 introduced a more reliable fix.

MFC after:	2 weeks
Sponsored by:	Modirum MDPay
This commit is contained in:
Kristof Provost 2020-12-01 16:34:43 +00:00
parent e133271fc1
commit 7f883a9b5b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=368238
2 changed files with 2 additions and 13 deletions
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5
sys/net/if.c
View File

@ -1338,11 +1338,6 @@ if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
ifindex_free_locked(ifp->if_index);
IFNET_WUNLOCK();
/* Don't re-attach DYING interfaces. */
if (ifp->if_flags & IFF_DYING)
return (0);
/*
* Perform interface-specific reassignment tasks, if provided by
* the driver.

10
sys/net/if_epair.c
View File

@ -611,14 +611,8 @@ epair_qflush(struct ifnet *ifp)
struct epair_softc *sc;
sc = ifp->if_softc;
/*
* See epair_clone_destroy(), we can end up getting called twice.
* Don't do anything on the second call.
*/
if (sc == NULL)
return;
KASSERT(sc != NULL, ("%s: ifp=%p, epair_softc gone? sc=%p\n",
__func__, ifp, sc));
/*
* Remove this ifp from all backpointer lists. The interface will not
* usable for flushing anyway nor should it have anything to flush