diff options
Diffstat (limited to 'sys/net80211/ieee80211_crypto_wep.c')
| -rw-r--r-- | sys/net80211/ieee80211_crypto_wep.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/sys/net80211/ieee80211_crypto_wep.c b/sys/net80211/ieee80211_crypto_wep.c index 45132419..eb8ad8a 100644 --- a/sys/net80211/ieee80211_crypto_wep.c +++ b/sys/net80211/ieee80211_crypto_wep.c @@ -82,6 +82,9 @@ struct wep_ctx { u_int32_t wc_iv; /* initial vector for crypto */ }; +/* number of references from net80211 layer */ +static int nrefs = 0; + static void * wep_attach(struct ieee80211com *ic, struct ieee80211_key *k) { @@ -96,6 +99,7 @@ wep_attach(struct ieee80211com *ic, struct ieee80211_key *k) ctx->wc_ic = ic; get_random_bytes(&ctx->wc_iv, sizeof(ctx->wc_iv)); + nrefs++; /* NB: we assume caller locking */ return ctx; } @@ -105,6 +109,8 @@ wep_detach(struct ieee80211_key *k) struct wep_ctx *ctx = k->wk_private; FREE(ctx, M_DEVBUF); + KASSERT(nrefs > 0, ("imbalanced attach/detach")); + nrefs--; /* NB: we assume caller locking */ } static int @@ -481,7 +487,14 @@ wep_modevent(module_t mod, int type, void *unused) ieee80211_crypto_register(&wep); return 0; case MOD_UNLOAD: - ieee80211_crypto_unregister(&wep); + case MOD_QUIESCE: + if (nrefs) { + printf("wlan_wep: still in use (%u dynamic refs)\n", + nrefs); + return EBUSY; + } + if (type == MOD_UNLOAD) + ieee80211_crypto_unregister(&wep); return 0; } return EINVAL; |
