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| author | Johannes Berg <johannes@sipsolutions.net> | 2009-05-18 19:56:36 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-05-20 14:46:30 -0400 |
| commit | e3da574a0ddd3e90a1e2b788b84b94bc17a75172 (patch) | |
| tree | dc17ed9268594c1236e1f0b5efae2140b226b5cf | |
| parent | 73606d00360cb93963aeb7bfbf8bfdbc51cfab9f (diff) | |
| download | op-kernel-dev-e3da574a0ddd3e90a1e2b788b84b94bc17a75172.zip op-kernel-dev-e3da574a0ddd3e90a1e2b788b84b94bc17a75172.tar.gz | |
cfg80211: allow wext to remove keys that don't exist
Some applications using wireless extensions expect to be able to
remove a key that doesn't exist. One example is wpa_supplicant
which doesn't actually change behaviour when running into an
error while trying to do that, but it prints an error message
which users interpret as wpa_supplicant having problems.
The safe thing to do is not change the behaviour of wireless
extensions any more, so when the driver reports -ENOENT let
the wext bridge code return success to userspace. To guarantee
this, also document that drivers should return -ENOENT when the
key doesn't exist.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | include/net/cfg80211.h | 5 | ||||
| -rw-r--r-- | net/wireless/wext-compat.c | 7 |
2 files changed, 10 insertions, 2 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 81a3bfa..389f1d2 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -781,10 +781,11 @@ enum wiphy_params_flags { * @get_key: get information about the key with the given parameters. * @mac_addr will be %NULL when requesting information for a group * key. All pointers given to the @callback function need not be valid - * after it returns. + * after it returns. This function should return an error if it is + * not possible to retrieve the key, -ENOENT if it doesn't exist. * * @del_key: remove a key given the @mac_addr (%NULL for a group key) - * and @key_index + * and @key_index, return -ENOENT if the key doesn't exist. * * @set_default_key: set the default key on an interface * diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c index f98090b..711e00a 100644 --- a/net/wireless/wext-compat.c +++ b/net/wireless/wext-compat.c @@ -504,6 +504,13 @@ static int cfg80211_set_encryption(struct cfg80211_registered_device *rdev, else if (idx == wdev->wext.default_mgmt_key) wdev->wext.default_mgmt_key = -1; } + /* + * Applications using wireless extensions expect to be + * able to delete keys that don't exist, so allow that. + */ + if (err == -ENOENT) + return 0; + return err; } else { if (addr) |
