dfc: port the latest fixes

Port the latest fixes from msm-4.19. This includes:
- Clear status flags when entering powersave (Ifc6457f1696ef)
- Adjust QMAP query grants (I9da42a9d2425)
- fix use-after-free (I76ab4a99b3f4)

Change-Id: I1beb93d1f6fdf214c8756bd0e488914bf876aa5e
Acked-by: Weiyi Chen <weiyic@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>

core/dfc.h

@@ -262,6 +262,36 @@ TRACE_EVENT(dfc_qmap,
 		__print_hex(__get_dynamic_array(data), __entry->len))
 );
 
+TRACE_EVENT(dfc_adjust_grant,
+
+	TP_PROTO(u8 mux_id, u8 bearer_id, u32 grant, u32 rx_bytes,
+		 u32 inflight, u32 a_grant),
+
+	TP_ARGS(mux_id, bearer_id, grant, rx_bytes, inflight, a_grant),
+
+	TP_STRUCT__entry(
+		__field(u8, mux_id)
+		__field(u8, bearer_id)
+		__field(u32, grant)
+		__field(u32, rx_bytes)
+		__field(u32, inflight)
+		__field(u32, a_grant)
+	),
+
+	TP_fast_assign(
+		__entry->mux_id = mux_id;
+		__entry->bearer_id = bearer_id;
+		__entry->grant = grant;
+		__entry->rx_bytes = rx_bytes;
+		__entry->inflight = inflight;
+		__entry->a_grant = a_grant;
+	),
+
+	TP_printk("mid=%u bid=%u grant=%u rx=%u inflight=%u adjusted_grant=%u",
+		__entry->mux_id, __entry->bearer_id, __entry->grant,
+		__entry->rx_bytes, __entry->inflight, __entry->a_grant)
+);
+
 #endif /* _TRACE_DFC_H */
 
 /* This part must be outside protection */