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mac80211: clean up key freeing a bit

Browse source 
When a key is allocated but not really added, there's no
need to go through the entire teardown process. Also, if
adding a key fails, ieee80211_key_link() can take care of
freeing it instead of the (only) caller.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2013-03-06 22:53:52 +01:00
parent 3d5839b6aa
commit 79cf2dfa36
3 changed files with 25 additions and 22 deletions
Download patch file Download diff file Expand all files Collapse all files

32
net/mac80211/key.c
View file

@ -397,6 +397,15 @@ struct ieee80211_key *ieee80211_key_alloc(u32 cipher, int idx, size_t key_len,
return key;
}
static void ieee80211_key_free_common(struct ieee80211_key *key)
{
if (key->conf.cipher == WLAN_CIPHER_SUITE_CCMP)
ieee80211_aes_key_free(key->u.ccmp.tfm);
if (key->conf.cipher == WLAN_CIPHER_SUITE_AES_CMAC)
ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm);
kfree(key);
}
static void __ieee80211_key_destroy(struct ieee80211_key *key,
bool delay_tailroom)
{
@ -412,10 +421,6 @@ static void __ieee80211_key_destroy(struct ieee80211_key *key,
if (key->local)
ieee80211_key_disable_hw_accel(key);
if (key->conf.cipher == WLAN_CIPHER_SUITE_CCMP)
ieee80211_aes_key_free(key->u.ccmp.tfm);
if (key->conf.cipher == WLAN_CIPHER_SUITE_AES_CMAC)
ieee80211_aes_cmac_key_free(key->u.aes_cmac.tfm);
if (key->local) {
struct ieee80211_sub_if_data *sdata = key->sdata;
@ -431,7 +436,13 @@ static void __ieee80211_key_destroy(struct ieee80211_key *key,
}
}
kfree(key);
ieee80211_key_free_common(key);
}
void ieee80211_key_free_unused(struct ieee80211_key *key)
{
WARN_ON(key->sdata || key->local);
ieee80211_key_free_common(key);
}
int ieee80211_key_link(struct ieee80211_key *key,
@ -469,6 +480,9 @@ int ieee80211_key_link(struct ieee80211_key *key,
ret = ieee80211_key_enable_hw_accel(key);
if (ret)
__ieee80211_key_free(key, true);
mutex_unlock(&sdata->local->key_mtx);
return ret;
@ -489,14 +503,6 @@ void __ieee80211_key_free(struct ieee80211_key *key, bool delay_tailroom)
__ieee80211_key_destroy(key, delay_tailroom);
}
void ieee80211_key_free(struct ieee80211_local *local,
struct ieee80211_key *key)
{
mutex_lock(&local->key_mtx);
__ieee80211_key_free(key, true);
mutex_unlock(&local->key_mtx);
}
void ieee80211_enable_keys(struct ieee80211_sub_if_data *sdata)
{
struct ieee80211_key *key;