diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2011-03-29 15:28:11 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-03-29 15:45:14 -0400 |
| commit | ffd8c746fbef50cf12df239f9d23c2afe1a2c3cb (patch) | |
| tree | a7004233c9607eee54fbb7fa4c40d386168a9d74 | |
| parent | 24047e2c4feb8c126e92cc5bb7a863115c89bd72 (diff) | |
| download | linux-ffd8c746fbef50cf12df239f9d23c2afe1a2c3cb.tar.gz linux-ffd8c746fbef50cf12df239f9d23c2afe1a2c3cb.tar.bz2 linux-ffd8c746fbef50cf12df239f9d23c2afe1a2c3cb.zip | |
iwlegacy: fix bugs in change_interface
If change_interface gets invoked during a firmware
restart, it may crash; prevent that from happening
by checking if ctx->vif is assigned.
Additionally, in my initial commit I forgot to set
the vif->p2p variable correctly, so fix that too.
Cc: stable@kernel.org [2.6.38+]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/iwlegacy/iwl-core.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlegacy/iwl-core.c b/drivers/net/wireless/iwlegacy/iwl-core.c index d418b647be80..a209a0e76bf0 100644 --- a/drivers/net/wireless/iwlegacy/iwl-core.c +++ b/drivers/net/wireless/iwlegacy/iwl-core.c @@ -1805,6 +1805,15 @@ iwl_legacy_mac_change_interface(struct ieee80211_hw *hw, mutex_lock(&priv->mutex); + if (!ctx->vif || !iwl_legacy_is_ready_rf(priv)) { + /* + * Huh? But wait ... this can maybe happen when + * we're in the middle of a firmware restart! + */ + err = -EBUSY; + goto out; + } + interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; if (!(interface_modes & BIT(newtype))) { @@ -1832,6 +1841,7 @@ iwl_legacy_mac_change_interface(struct ieee80211_hw *hw, /* success */ iwl_legacy_teardown_interface(priv, vif, true); vif->type = newtype; + vif->p2p = newp2p; err = iwl_legacy_setup_interface(priv, ctx); WARN_ON(err); /* |