diff options
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/ath/wcn36xx/hal.h | 3 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/wcn36xx/smd.c | 27 |
2 files changed, 28 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/wcn36xx/hal.h b/drivers/net/wireless/ath/wcn36xx/hal.h index d713204f755d..3af16cba3d12 100644 --- a/drivers/net/wireless/ath/wcn36xx/hal.h +++ b/drivers/net/wireless/ath/wcn36xx/hal.h @@ -54,6 +54,9 @@ /* Default Beacon template size */ #define BEACON_TEMPLATE_SIZE 0x180 +/* Minimum PVM size that the FW expects. See comment in smd.c for details. */ +#define TIM_MIN_PVM_SIZE 6 + /* Param Change Bitmap sent to HAL */ #define PARAM_BCN_INTERVAL_CHANGED (1 << 0) #define PARAM_SHORT_PREAMBLE_CHANGED (1 << 1) diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c index ff3ed2461a69..089a7e445cd6 100644 --- a/drivers/net/wireless/ath/wcn36xx/smd.c +++ b/drivers/net/wireless/ath/wcn36xx/smd.c @@ -1375,12 +1375,19 @@ int wcn36xx_smd_send_beacon(struct wcn36xx *wcn, struct ieee80211_vif *vif, u16 p2p_off) { struct wcn36xx_hal_send_beacon_req_msg msg_body; - int ret = 0; + int ret = 0, pad, pvm_len; mutex_lock(&wcn->hal_mutex); INIT_HAL_MSG(msg_body, WCN36XX_HAL_SEND_BEACON_REQ); - msg_body.beacon_length = skb_beacon->len; + pvm_len = skb_beacon->data[tim_off + 1] - 3; + pad = TIM_MIN_PVM_SIZE - pvm_len; + + /* Padding is irrelevant to mesh mode since tim_off is always 0. */ + if (vif->type == NL80211_IFTYPE_MESH_POINT) + pad = 0; + + msg_body.beacon_length = skb_beacon->len + pad; /* TODO need to find out why + 6 is needed */ msg_body.beacon_length6 = msg_body.beacon_length + 6; @@ -1393,6 +1400,22 @@ int wcn36xx_smd_send_beacon(struct wcn36xx *wcn, struct ieee80211_vif *vif, memcpy(msg_body.beacon, skb_beacon->data, skb_beacon->len); memcpy(msg_body.bssid, vif->addr, ETH_ALEN); + if (pad > 0) { + /* + * The wcn36xx FW has a fixed size for the PVM in the TIM. If + * given the beacon template from mac80211 with a PVM shorter + * than the FW expectes it will overwrite the data after the + * TIM. + */ + wcn36xx_dbg(WCN36XX_DBG_HAL, "Pad TIM PVM. %d bytes at %d\n", + pad, pvm_len); + memmove(&msg_body.beacon[tim_off + 5 + pvm_len + pad], + &msg_body.beacon[tim_off + 5 + pvm_len], + skb_beacon->len - (tim_off + 5 + pvm_len)); + memset(&msg_body.beacon[tim_off + 5 + pvm_len], 0, pad); + msg_body.beacon[tim_off + 1] += pad; + } + /* TODO need to find out why this is needed? */ if (vif->type == NL80211_IFTYPE_MESH_POINT) /* mesh beacon don't need this, so push further down */ |
