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ath10k: fix add_interface failure handling 

If something failed along add_interface() setup it
was possible to leak a vdev id, vdev and peer.

This could end up with leaked FW state or FW crash
(assuming add_interface() failure wasn't a result of
a crash).

kvalo: rebased, whitespace fixes

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Michal Kazior 2013-10-16 15:44:45 +03:00 committed by Kalle Valo
parent cc4827b97b
commit 9dad14ae28
1 changed files with 40 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
drivers/net/wireless/ath/ath10k/mac.c
View File

@ -2043,18 +2043,17 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
if ((vif->type == NL80211_IFTYPE_MONITOR) && ar->monitor_present) {
ath10k_warn("Only one monitor interface allowed\n");
ret = -EBUSY;
goto exit;
goto err;
}
bit = ffs(ar->free_vdev_map);
if (bit == 0) {
ret = -EBUSY;
goto exit;
goto err;
}
arvif->vdev_id = bit - 1;
arvif->vdev_subtype = WMI_VDEV_SUBTYPE_NONE;
ar->free_vdev_map &= ~(1 << arvif->vdev_id);
if (ar->p2p)
arvif->vdev_subtype = WMI_VDEV_SUBTYPE_P2P_DEVICE;
@ -2090,27 +2089,33 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
arvif->vdev_subtype, vif->addr);
if (ret) {
ath10k_warn("WMI vdev create failed: ret %d\n", ret);
goto exit;
goto err;
}
ar->free_vdev_map &= ~BIT(arvif->vdev_id);
vdev_param = ar->wmi.vdev_param->def_keyid;
ret = ath10k_wmi_vdev_set_param(ar, 0, vdev_param,
arvif->def_wep_key_idx);
if (ret)
if (ret) {
ath10k_warn("Failed to set default keyid: %d\n", ret);
goto err_vdev_delete;
}
vdev_param = ar->wmi.vdev_param->tx_encap_type;
ret = ath10k_wmi_vdev_set_param(ar, arvif->vdev_id, vdev_param,
ATH10K_HW_TXRX_NATIVE_WIFI);
/* 10.X firmware does not support this VDEV parameter. Do not warn */
if (ret && ret != -EOPNOTSUPP)
if (ret && ret != -EOPNOTSUPP) {
ath10k_warn("Failed to set TX encap: %d\n", ret);
goto err_vdev_delete;
}
if (arvif->vdev_type == WMI_VDEV_TYPE_AP) {
ret = ath10k_peer_create(ar, arvif->vdev_id, vif->addr);
if (ret) {
ath10k_warn("Failed to create peer for AP: %d\n", ret);
goto exit;
goto err_vdev_delete;
}
}
@ -2119,39 +2124,61 @@ static int ath10k_add_interface(struct ieee80211_hw *hw,
value = WMI_STA_PS_RX_WAKE_POLICY_WAKE;
ret = ath10k_wmi_set_sta_ps_param(ar, arvif->vdev_id,
param, value);
if (ret)
if (ret) {
ath10k_warn("Failed to set RX wake policy: %d\n", ret);
goto err_peer_delete;
}
param = WMI_STA_PS_PARAM_TX_WAKE_THRESHOLD;
value = WMI_STA_PS_TX_WAKE_THRESHOLD_ALWAYS;
ret = ath10k_wmi_set_sta_ps_param(ar, arvif->vdev_id,
param, value);
if (ret)
if (ret) {
ath10k_warn("Failed to set TX wake thresh: %d\n", ret);
goto err_peer_delete;
}
param = WMI_STA_PS_PARAM_PSPOLL_COUNT;
value = WMI_STA_PS_PSPOLL_COUNT_NO_MAX;
ret = ath10k_wmi_set_sta_ps_param(ar, arvif->vdev_id,
param, value);
if (ret)
if (ret) {
ath10k_warn("Failed to set PSPOLL count: %d\n", ret);
goto err_peer_delete;
}
}
ret = ath10k_mac_set_rts(arvif, ar->hw->wiphy->rts_threshold);
if (ret)
if (ret) {
ath10k_warn("failed to set rts threshold for vdev %d (%d)\n",
arvif->vdev_id, ret);
goto err_peer_delete;
}
ret = ath10k_mac_set_frag(arvif, ar->hw->wiphy->frag_threshold);
if (ret)
if (ret) {
ath10k_warn("failed to set frag threshold for vdev %d (%d)\n",
arvif->vdev_id, ret);
goto err_peer_delete;
}
if (arvif->vdev_type == WMI_VDEV_TYPE_MONITOR)
ar->monitor_present = true;
exit:
mutex_unlock(&ar->conf_mutex);
return 0;
err_peer_delete:
if (arvif->vdev_type == WMI_VDEV_TYPE_AP)
ath10k_wmi_peer_delete(ar, arvif->vdev_id, vif->addr);
err_vdev_delete:
ath10k_wmi_vdev_delete(ar, arvif->vdev_id);
ar->free_vdev_map &= ~BIT(arvif->vdev_id);
err:
mutex_unlock(&ar->conf_mutex);
return ret;
}