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iwlegacy: do not nulify il->vif on reset

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This il->vif is dereferenced in different part of iwlegacy code, so do
not nullify it. This should fix random crashes observed in companion
with microcode errors i.e. crash in il3945_config_ap().

Additionally this should address also
WARNING: at drivers/net/wireless/iwlegacy/common.c:4656 il_mac_remove_interface
at least one of the possible reasons of that warning.

Cc: stable@vger.kernel.org
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Stanislaw Gruszka
2012-03-13 16:11:27 +01:00
zatwierdzone przez John W. Linville
rodzic 8a78335442
commit 883a649b73
3 zmienionych plików z 12 dodań i 7 usunięć
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15
drivers/net/wireless/iwlegacy/common.c
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@@ -4508,6 +4508,7 @@ il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
struct il_priv *il = hw->priv;
int err;
bool reset;
mutex_lock(&il->mutex);
D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
@@ -4518,7 +4519,12 @@ il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
goto out;
}
if (il->vif) {
/*
* We do not support multiple virtual interfaces, but on hardware reset
* we have to add the same interface again.
*/
reset = (il->vif == vif);
if (il->vif && !reset) {
err = -EOPNOTSUPP;
goto out;
}
@@ -4528,8 +4534,11 @@ il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
err = il_set_mode(il);
if (err) {
il->vif = NULL;
il->iw_mode = NL80211_IFTYPE_STATION;
IL_WARN("Fail to set mode %d\n", vif->type);
if (!reset) {
il->vif = NULL;
il->iw_mode = NL80211_IFTYPE_STATION;
}
}
out: