wcn36xx: pass information elements in scan requests

When the wifi driver core passes IE elements in the scan request, append
them to the firmware message. The driver currently tells the core that
it is capable of attaching up to WCN36XX_MAX_SCAN_IE_LEN octets, but
doesn't actually pass them to the the hardware.

Note that this patch doesn't fix a bug that was observed. The change is
merely done for the sake of completeness as the hardware supports
appending IEs in scans. Tests show that network scans work fine with
this patch applied.

Some defines were moved around to avoid cyclic include dependencies.

Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/ath/wcn36xx/hal.h b/drivers/net/wireless/ath/wcn36xx/hal.h
index 182963522941a436166bd665de147c5a678fb0e9..2aed6c233508a9babf682a2efeaf25f639ebafc7 100644 (file)
--- a/drivers/net/wireless/ath/wcn36xx/hal.h
+++ b/drivers/net/wireless/ath/wcn36xx/hal.h
@@ -88,6 +88,12 @@
 /* version string max length (including NULL) */
 #define WCN36XX_HAL_VERSION_LENGTH  64
 
+/* How many frames until we start a-mpdu TX session */
+#define WCN36XX_AMPDU_START_THRESH     20
+
+#define WCN36XX_MAX_SCAN_SSIDS         9
+#define WCN36XX_MAX_SCAN_IE_LEN                500
+
 /* message types for messages exchanged between WDI and HAL */
 enum wcn36xx_hal_host_msg_type {
        /* Init/De-Init */
@@ -1170,7 +1176,7 @@ struct wcn36xx_hal_start_scan_offload_req_msg {
 
        /* IE field */
        u16 ie_len;
-       u8 ie[0];
+       u8 ie[WCN36XX_MAX_SCAN_IE_LEN];
 } __packed;
 
 struct wcn36xx_hal_start_scan_offload_rsp_msg {

diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index 9c8ce5e0454f80fd8934e226552adbdb76d7f1a5..ea74f2b92df50330066741a0b3ba472b9f088162 100644 (file)
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -624,6 +624,9 @@ int wcn36xx_smd_start_hw_scan(struct wcn36xx *wcn, struct ieee80211_vif *vif,
        struct wcn36xx_hal_start_scan_offload_req_msg msg_body;
        int ret, i;
 
+       if (req->ie_len > WCN36XX_MAX_SCAN_IE_LEN)
+               return -EINVAL;
+
        mutex_lock(&wcn->hal_mutex);
        INIT_HAL_MSG(msg_body, WCN36XX_HAL_START_SCAN_OFFLOAD_REQ);
 
@@ -648,6 +651,14 @@ int wcn36xx_smd_start_hw_scan(struct wcn36xx *wcn, struct ieee80211_vif *vif,
        for (i = 0; i < msg_body.num_channel; i++)
                msg_body.channels[i] = req->channels[i]->hw_value;
 
+       msg_body.header.len -= WCN36XX_MAX_SCAN_IE_LEN;
+
+       if (req->ie_len > 0) {
+               msg_body.ie_len = req->ie_len;
+               msg_body.header.len += req->ie_len;
+               memcpy(msg_body.ie, req->ie, req->ie_len);
+       }
+
        PREPARE_HAL_BUF(wcn->hal_buf, msg_body);
 
        wcn36xx_dbg(WCN36XX_DBG_HAL,

diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
index 22e05cb4eb9844913c85eac642535a5c5b7b80ca..9343989d1169034ef925c548ae0dadc48b8348f8 100644 (file)
--- a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
+++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
@@ -32,12 +32,6 @@
 #define WLAN_NV_FILE               "wlan/prima/WCNSS_qcom_wlan_nv.bin"
 #define WCN36XX_AGGR_BUFFER_SIZE 64
 
-/* How many frames until we start a-mpdu TX session */
-#define WCN36XX_AMPDU_START_THRESH     20
-
-#define WCN36XX_MAX_SCAN_SSIDS         9
-#define WCN36XX_MAX_SCAN_IE_LEN                500
-
 extern unsigned int wcn36xx_dbg_mask;
 
 enum wcn36xx_debug_mask {