iwlwifi: mvm: print scanned channel list on scan iteration complete notification

When receiving scan iteration complete notification, print a list of
the channels that have been scanned in this iteration.
This is useful for debugging.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/mvm/scan.c b/drivers/net/wireless/iwlwifi/mvm/scan.c
index 7777d56cbb606f8618e50370c4ed47ee18258de8..e859584f0f3573e9642a8b6e4d373b75dbf43872 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/scan.c
+++ b/drivers/net/wireless/iwlwifi/mvm/scan.c
@@ -312,16 +312,35 @@ int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
        return max_ie_len;
 }
 
+static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res,
+                                    int num_res, u8 *buf, size_t buf_size)
+{
+       int i;
+       u8 *pos = buf, *end = buf + buf_size;
+
+       for (i = 0; pos < end && i < num_res; i++)
+               pos += snprintf(pos, end - pos, " %u", res[i].channel);
+
+       /* terminate the string in case the buffer was too short */
+       *(buf + buf_size - 1) = '\0';
+
+       return buf;
+}
+
 int iwl_mvm_rx_scan_offload_iter_complete_notif(struct iwl_mvm *mvm,
                                                struct iwl_rx_cmd_buffer *rxb,
                                                struct iwl_device_cmd *cmd)
 {
        struct iwl_rx_packet *pkt = rxb_addr(rxb);
        struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
+       u8 buf[256];
 
        IWL_DEBUG_SCAN(mvm,
-                      "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
-                      notif->status, notif->scanned_channels);
+                      "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
+                      notif->status, notif->scanned_channels,
+                      iwl_mvm_dump_channel_list(notif->results,
+                                                notif->scanned_channels, buf,
+                                                sizeof(buf)));
        return 0;
 }