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iwlwifi: mvm: advertise only HW-supported ciphers 

After the new ciphers CCMP-256 and GCMP-128/256 were implemented,
wpa_supplicant could start negotiating them and use the software
implementation. This, however, breaks D3 behaviour in the driver
since it means that WoWLAN will not be possible.

To avoid breaking that feature, advertise only ciphers that the
hardware supports.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Johannes Berg 2015-05-20 16:51:28 +02:00 committed by Emmanuel Grumbach
parent 42bbd6ecca
commit 5f4c02e2b8
2 changed files with 27 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/net/wireless/iwlwifi/mvm/mac80211.c
View File

@ -415,6 +415,12 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
{
struct ieee80211_hw *hw = mvm->hw;
int num_mac, ret, i;
static const u32 mvm_ciphers[] = {
WLAN_CIPHER_SUITE_WEP40,
WLAN_CIPHER_SUITE_WEP104,
WLAN_CIPHER_SUITE_TKIP,
WLAN_CIPHER_SUITE_CCMP,
};
/* Tell mac80211 our characteristics */
hw->flags = IEEE80211_HW_SIGNAL_DBM |
@ -441,14 +447,32 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 2);
memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
hw->wiphy->cipher_suites = mvm->ciphers;
/*
* Enable 11w if advertised by firmware and software crypto
* is not enabled (as the firmware will interpret some mgmt
* packets, so enabling it with software crypto isn't safe)
*/
if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
!iwlwifi_mod_params.sw_crypto)
!iwlwifi_mod_params.sw_crypto) {
hw->flags |= IEEE80211_HW_MFP_CAPABLE;
mvm->ciphers[hw->wiphy->n_cipher_suites] =
WLAN_CIPHER_SUITE_AES_CMAC;
hw->wiphy->n_cipher_suites++;
}
/* currently FW API supports only one optional cipher scheme */
if (mvm->fw->cs[0].cipher) {
mvm->hw->n_cipher_schemes = 1;
mvm->hw->cipher_schemes = &mvm->fw->cs[0];
mvm->ciphers[hw->wiphy->n_cipher_suites] =
mvm->fw->cs[0].cipher;
hw->wiphy->n_cipher_suites++;
}
hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
hw->wiphy->features |=
@ -574,12 +598,6 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
/* currently FW API supports only one optional cipher scheme */
if (mvm->fw->cs[0].cipher) {
mvm->hw->n_cipher_schemes = 1;
mvm->hw->cipher_schemes = &mvm->fw->cs[0];
}
#ifdef CONFIG_PM_SLEEP
if (iwl_mvm_is_d0i3_supported(mvm) &&
device_can_wakeup(mvm->trans->dev)) {

2
drivers/net/wireless/iwlwifi/mvm/mvm.h
View File

@ -820,6 +820,8 @@ struct iwl_mvm {
} tdls_cs;
struct iwl_mvm_shared_mem_cfg shared_mem_cfg;
u32 ciphers[6];
};
/* Extract MVM priv from op_mode and _hw */