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gmm: Allow cb callers to take ownsership of msgb primitive

Change-Id: Ic60e73d8ba13681217bcb35e4b66cc565239cfd2
---
M src/gmm/gmm_prim.c
1 file changed, 17 insertions(+), 2 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/libosmo-gprs refs/changes/83/32483/1

diff --git a/src/gmm/gmm_prim.c b/src/gmm/gmm_prim.c
index 69e74a2..b1119fe 100644
--- a/src/gmm/gmm_prim.c
+++ b/src/gmm/gmm_prim.c
@@ -346,7 +346,10 @@
 		rc = g_gmm_ctx->gmm_up_cb(gmm_prim, g_gmm_ctx->gmm_up_cb_user_data);
 	else
 		rc = gmm_up_cb_dummy(gmm_prim, g_gmm_ctx->gmm_up_cb_user_data);
-	msgb_free(gmm_prim->oph.msg);
+	if (rc != 1)
+		msgb_free(gmm_prim->oph.msg);
+	else
+		rc = 0;
 	return rc;
 }
 
@@ -505,7 +508,10 @@
 		rc = g_gmm_ctx->gmm_down_cb(gmm_prim, g_gmm_ctx->gmm_down_cb_user_data);
 	else
 		rc = gmm_down_cb_dummy(gmm_prim, g_gmm_ctx->gmm_down_cb_user_data);
-	msgb_free(gmm_prim->oph.msg);
+	if (rc != 1)
+		msgb_free(gmm_prim->oph.msg);
+	else
+		rc = 0;
 	return rc;
 }
 

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