Fix regression issue after r351616. Make sure the mbuf queue gets initialized.

Found by:	gonzo@
MFC after:	1 week
Sponsored by:	Mellanox Technologies

diff --git a/sys/dev/usb/net/usb_ethernet.c b/sys/dev/usb/net/usb_ethernet.c
index 57be7d69d4abf2e87124be5b8040554e68f4b7e4..b637f1ace0e175baef071daa2b2e31fefbf06781 100644 (file)
--- a/sys/dev/usb/net/usb_ethernet.c
+++ b/sys/dev/usb/net/usb_ethernet.c
@@ -219,6 +219,7 @@ ue_attach_post_task(struct usb_proc_msg *_task)
        ue->ue_unit = alloc_unr(ueunit);
        usb_callout_init_mtx(&ue->ue_watchdog, ue->ue_mtx, 0);
        sysctl_ctx_init(&ue->ue_sysctl_ctx);
+       mbufq_init(&ue->ue_rxq, 0 /* unlimited length */);
 
        error = 0;
        CURVNET_SET_QUIET(vnet0);
@@ -284,6 +285,11 @@ ue_attach_post_task(struct usb_proc_msg *_task)
 
 fail:
        CURVNET_RESTORE();
+
+       /* drain mbuf queue */
+       mbufq_drain(&ue->ue_rxq);
+
+       /* free unit */
        free_unr(ueunit, ue->ue_unit);
        if (ue->ue_ifp != NULL) {
                if_free(ue->ue_ifp);
@@ -330,6 +336,9 @@ uether_ifdetach(struct usb_ether *ue)
                /* free sysctl */
                sysctl_ctx_free(&ue->ue_sysctl_ctx);
 
+               /* drain mbuf queue */
+               mbufq_drain(&ue->ue_rxq);
+
                /* free unit */
                free_unr(ueunit, ue->ue_unit);
        }