iwlwifi: add skb address to tx cmd in trace events data

This helps matching tx cmd with other trace events, like net_dev_xmit
and net_dev_queue etc.
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-devtrace-iwlwifi.h

@@ -95,7 +95,7 @@ TRACE_EVENT(iwlwifi_dev_tx,
 	TP_ARGS(dev, skb, tfd, tfdlen, buf0, buf0_len, hdr_len),
 	TP_STRUCT__entry(
 		DEV_ENTRY
-
+		__field(void *, skbaddr)
 		__field(size_t, framelen)
 		__dynamic_array(u8, tfd, tfdlen)
 
@@ -110,6 +110,7 @@ TRACE_EVENT(iwlwifi_dev_tx,
 	),
 	TP_fast_assign(
 		DEV_ASSIGN;
+		__entry->skbaddr = skb;
 		__entry->framelen = buf0_len;
 		if (hdr_len > 0)
 			__entry->framelen += skb->len - hdr_len;
@@ -120,9 +121,9 @@ TRACE_EVENT(iwlwifi_dev_tx,
 				      __get_dynamic_array(buf1),
 				      skb->len - hdr_len);
 	),
-	TP_printk("[%s] TX %.2x (%zu bytes)",
+	TP_printk("[%s] TX %.2x (%zu bytes) skbaddr=%p",
 		  __get_str(dev), ((u8 *)__get_dynamic_array(buf0))[0],
-		  __entry->framelen)
+		  __entry->framelen, __entry->skbaddr)
 );
 
 TRACE_EVENT(iwlwifi_dev_ucode_error,