From 999d2568ee0c2bbdf71a414e85fffe5d58fe766a Mon Sep 17 00:00:00 2001 From: Luciano Coelho Date: Fri, 27 Mar 2015 10:28:26 +0300 Subject: [PATCH] iwlwifi: mvm: combine scan size checks into a common function Instead of repeating the same code in 4 different places, combine the comparisons into a new function. Additionally, this change fixes UMAC scans where the RRM IEs were not taken into consideration when calculating the IE length. Signed-off-by: Luciano Coelho Reviewed-by: Johannes Berg Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/mvm/mac80211.c | 2 +- drivers/net/wireless/iwlwifi/mvm/mvm.h | 2 +- drivers/net/wireless/iwlwifi/mvm/scan.c | 44 +++++++++------------ 3 files changed, 21 insertions(+), 27 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c index 249d02079a48..8d9e5da1db3c 100644 --- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c @@ -505,7 +505,7 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm) iwl_mvm_reset_phy_ctxts(mvm); - hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false); + hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm); hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h index a8f51a824a75..7679ad680194 100644 --- a/drivers/net/wireless/iwlwifi/mvm/mvm.h +++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h @@ -1168,7 +1168,7 @@ int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct ieee80211_scan_ies *ies); int iwl_mvm_scan_size(struct iwl_mvm *mvm); int iwl_mvm_cancel_scan(struct iwl_mvm *mvm); -int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm, bool is_sched_scan); +int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm); void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm); /* Scheduled scan */ diff --git a/drivers/net/wireless/iwlwifi/mvm/scan.c b/drivers/net/wireless/iwlwifi/mvm/scan.c index cbed9f31758c..95b986238e57 100644 --- a/drivers/net/wireless/iwlwifi/mvm/scan.c +++ b/drivers/net/wireless/iwlwifi/mvm/scan.c @@ -296,8 +296,7 @@ static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT; } -static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm, - bool is_sched_scan) +static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) { int max_probe_len; @@ -313,9 +312,9 @@ static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm, return max_probe_len; } -int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm, bool is_sched_scan) +int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) { - int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm, is_sched_scan); + int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm); /* TODO: [BUG] This function should return the maximum allowed size of * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs @@ -802,6 +801,18 @@ iwl_mvm_build_generic_scan_cmd(struct iwl_mvm *mvm, cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED); } +static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, + struct ieee80211_scan_ies *ies, + int n_channels) +{ + return ((n_ssids <= PROBE_OPTION_MAX) && + (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & + (ies->common_ie_len + + ies->len[NL80211_BAND_2GHZ] + + ies->len[NL80211_BAND_5GHZ] <= + iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); +} + static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, struct cfg80211_scan_request *req, struct ieee80211_scan_ies *ies) @@ -825,11 +836,7 @@ static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, if (WARN_ON(mvm->scan_cmd == NULL)) return -ENOMEM; - if (req->n_ssids > PROBE_OPTION_MAX || - ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] + - ies->len[NL80211_BAND_5GHZ] > - iwl_mvm_max_scan_ie_fw_cmd_room(mvm, false) || - req->n_channels > mvm->fw->ucode_capa.n_scan_channels) + if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) return -ENOBUFS; mvm->scan_status |= IWL_MVM_SCAN_REGULAR; @@ -938,11 +945,7 @@ static int iwl_mvm_sched_scan_lmac(struct iwl_mvm *mvm, if (WARN_ON(mvm->scan_cmd == NULL)) return -ENOMEM; - if (req->n_ssids > PROBE_OPTION_MAX || - ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] + - ies->len[NL80211_BAND_5GHZ] > - iwl_mvm_max_scan_ie_fw_cmd_room(mvm, true) || - req->n_channels > mvm->fw->ucode_capa.n_scan_channels) + if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) return -ENOBUFS; iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, ¶ms); @@ -1316,12 +1319,7 @@ static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, if (WARN_ON(mvm->scan_cmd == NULL)) return -ENOMEM; - if (WARN_ON(req->n_ssids > PROBE_OPTION_MAX || - ies->common_ie_len + - ies->len[NL80211_BAND_2GHZ] + - ies->len[NL80211_BAND_5GHZ] + 24 + 2 > - SCAN_OFFLOAD_PROBE_REQ_SIZE || req->n_channels > - mvm->fw->ucode_capa.n_scan_channels)) + if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) return -ENOBUFS; iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, @@ -1414,11 +1412,7 @@ static int iwl_mvm_sched_scan_umac(struct iwl_mvm *mvm, if (WARN_ON(mvm->scan_cmd == NULL)) return -ENOMEM; - if (WARN_ON(req->n_ssids > PROBE_OPTION_MAX || - ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] + - ies->len[NL80211_BAND_5GHZ] + 24 + 2 > - SCAN_OFFLOAD_PROBE_REQ_SIZE || req->n_channels > - mvm->fw->ucode_capa.n_scan_channels)) + if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) return -ENOBUFS; iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, -- GitLab