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wl12xx: AP-mode - fix race condition on sta connection

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If a sta starts transmitting immediately after authentication, sometimes
the FW deauthenticates it. Fix this by marking the sta "in-connection"
in FW before sending the autentication response.

The "in-connection" entry is automatically removed when connection
succeeds or after a timeout.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
This commit is contained in:
Arik Nemtsov 2011-02-23 00:22:25 +02:00 committed by Luciano Coelho
parent f4d08ddd3e
commit 99a2775d02
3 changed files with 53 additions and 0 deletions
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25
drivers/net/wireless/wl12xx/acx.c
View File

@ -1541,3 +1541,28 @@ int wl1271_acx_config_ps(struct wl1271 *wl)
kfree(config_ps);
return ret;
}
int wl1271_acx_set_inconnection_sta(struct wl1271 *wl, u8 *addr)
{
struct wl1271_acx_inconnection_sta *acx = NULL;
int ret;
wl1271_debug(DEBUG_ACX, "acx set inconnaction sta %pM", addr);
acx = kzalloc(sizeof(*acx), GFP_KERNEL);
if (!acx)
return -ENOMEM;
memcpy(acx->addr, addr, ETH_ALEN);
ret = wl1271_cmd_configure(wl, ACX_UPDATE_INCONNECTION_STA_LIST,
acx, sizeof(*acx));
if (ret < 0) {
wl1271_warning("acx set inconnaction sta failed: %d", ret);
goto out;
}
out:
kfree(acx);
return ret;
}

9
drivers/net/wireless/wl12xx/acx.h
View File

@ -1155,6 +1155,13 @@ struct wl1271_acx_config_ps {
__le32 null_data_rate;
} __packed;
struct wl1271_acx_inconnection_sta {
struct acx_header header;
u8 addr[ETH_ALEN];
u8 padding1[2];
} __packed;
enum {
ACX_WAKE_UP_CONDITIONS = 0x0002,
ACX_MEM_CFG = 0x0003,
@ -1215,6 +1222,7 @@ enum {
ACX_GEN_FW_CMD = 0x0070,
ACX_HOST_IF_CFG_BITMAP = 0x0071,
ACX_MAX_TX_FAILURE = 0x0072,
ACX_UPDATE_INCONNECTION_STA_LIST = 0x0073,
DOT11_RX_MSDU_LIFE_TIME = 0x1004,
DOT11_CUR_TX_PWR = 0x100D,
DOT11_RX_DOT11_MODE = 0x1012,
@ -1290,5 +1298,6 @@ int wl1271_acx_set_ba_receiver_session(struct wl1271 *wl, u8 tid_index, u16 ssn,
int wl1271_acx_tsf_info(struct wl1271 *wl, u64 *mactime);
int wl1271_acx_max_tx_retry(struct wl1271 *wl);
int wl1271_acx_config_ps(struct wl1271 *wl);
int wl1271_acx_set_inconnection_sta(struct wl1271 *wl, u8 *addr);
#endif /* __WL1271_ACX_H__ */

19
drivers/net/wireless/wl12xx/tx.c
View File

@ -70,6 +70,22 @@ static void wl1271_free_tx_id(struct wl1271 *wl, int id)
}
}
static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl,
struct sk_buff *skb)
{
struct ieee80211_hdr *hdr;
/*
* add the station to the known list before transmitting the
* authentication response. this way it won't get de-authed by FW
* when transmitting too soon.
*/
hdr = (struct ieee80211_hdr *)(skb->data +
sizeof(struct wl1271_tx_hw_descr));
if (ieee80211_is_auth(hdr->frame_control))
wl1271_acx_set_inconnection_sta(wl, hdr->addr1);
}
static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra,
u32 buf_offset)
{
@ -238,6 +254,9 @@ static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb,
if (ret < 0)
return ret;
if (wl->bss_type == BSS_TYPE_AP_BSS)
wl1271_tx_ap_update_inconnection_sta(wl, skb);
wl1271_tx_fill_hdr(wl, skb, extra, info);
/*