mwifiex: bring in scan channel gap feature

With scan channel gap when any station/AP is active, FW comes back
to connected channel for any pending data transfter after scanning each
channel.
We set scan channel gap TLV to FW in scan command when any of the
interface is active. This enables scan channel gap in FW.
Also when scan channel gap is enabled, we would scan maximum channels
allowed by FW.

Scan channel gap is supported only on FW with V15 FW API.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Marc Yang <yangyang@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/scan.c b/drivers/net/wireless/mwifiex/scan.c
index 0c9ed2c730d7..2f86bb63f3c0 100644
--- a/drivers/net/wireless/mwifiex/scan.c
+++ b/drivers/net/wireless/mwifiex/scan.c
@@ -799,6 +799,7 @@ mwifiex_config_scan(struct mwifiex_private *priv,
 {
         struct mwifiex_adapter *adapter = priv->adapter;
         struct mwifiex_ie_types_num_probes *num_probes_tlv;
+        struct mwifiex_ie_types_scan_chan_gap *chan_gap_tlv;
         struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
         struct mwifiex_ie_types_bssid_list *bssid_tlv;
         u8 *tlv_pos;
@@ -939,6 +940,22 @@ mwifiex_config_scan(struct mwifiex_private *priv,
         else
                 *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
 
+        if (user_scan_in->scan_chan_gap) {
+                *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
+                dev_dbg(adapter->dev, "info: scan: channel gap = %d\n",
+                        user_scan_in->scan_chan_gap);
+
+                chan_gap_tlv = (void *)tlv_pos;
+                chan_gap_tlv->header.type =
+                                         cpu_to_le16(TLV_TYPE_SCAN_CHANNEL_GAP);
+                chan_gap_tlv->header.len =
+                        cpu_to_le16(sizeof(chan_gap_tlv->chan_gap));
+                chan_gap_tlv->chan_gap =
+                                     cpu_to_le16((user_scan_in->scan_chan_gap));
+
+                tlv_pos += sizeof(struct mwifiex_ie_types_scan_chan_gap);
+        }
+
         /* If the input config or adapter has the number of Probes set,
            add tlv */
         if (num_probes) {