From: Tomas Tvaroha <tomas.tvaroha@e4t.cz>
Date: Fri, 19 Aug 2016 09:21:52 +0000 (+0200)
Subject: sllin: add single-response flag
X-Git-Url: http://rtime.felk.cvut.cz/gitweb/linux-lin.git/commitdiff_plain/45653655d66c6631a7993781ae87d521cbff9e56

sllin: add single-response flag
---

diff --git a/sllin/linux/lin_bus.h b/sllin/linux/lin_bus.h
index dbd9a78..151d18f 100644
--- a/sllin/linux/lin_bus.h
+++ b/sllin/linux/lin_bus.h
@@ -11,6 +11,7 @@
 
 #define LIN_CACHE_RESPONSE	(1 << (LIN_CANFR_FLAGS_OFFS))
 #define LIN_CHECKSUM_EXTENDED	(1 << (LIN_CANFR_FLAGS_OFFS + 1))
+#define LIN_SINGLE_RESPONSE (1 << (LIN_CANFR_FLAGS_OFFS + 2))
 
 
 /* Error flags */
diff --git a/sllin/sllin.c b/sllin/sllin.c
index 908cce9..1febab2 100644
--- a/sllin/sllin.c
+++ b/sllin/sllin.c
@@ -1106,6 +1106,9 @@ static int sllin_kwthread(void *ptr)
 				if ((sce->frame_fl & LIN_CACHE_RESPONSE)
 					&& (sce->dlc > 0)) {
 
+					if (sce->frame_fl & LIN_SINGLE_RESPONSE)
+						sce->frame_fl &= ~LIN_CACHE_RESPONSE;
+
 					netdev_dbg(sl->dev, "Sending LIN response from linfr_cache\n");
 
 					lin_data = sce->data;
@@ -1256,6 +1259,9 @@ slstate_response_wait:
 			if ((sce->frame_fl & LIN_CACHE_RESPONSE)
 					&& (sce->dlc > 0)) {
 
+				if (sce->frame_fl & LIN_SINGLE_RESPONSE)
+					sce->frame_fl &= ~LIN_CACHE_RESPONSE;
+
 				netdev_dbg(sl->dev, "Sending LIN response from linfr_cache\n");
 
 				lin_data = sce->data;