garp: retry sending JoinIn messages after allocation failures
Increase reliability by retrying to send JoinIn messages after memory
allocation failures on each TRANSMIT_PDU event until it succeeds.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/802/garp.c b/net/802/garp.c
index 3b78f7b..1dcb066 100644
--- a/net/802/garp.c
+++ b/net/802/garp.c
@@ -323,7 +323,10 @@
case GARP_ACTION_NONE:
break;
case GARP_ACTION_S_JOIN_IN:
- garp_pdu_append_attr(app, attr, GARP_JOIN_IN);
+ /* When appending the attribute fails, don't update state in
+ * order to retry on next TRANSMIT_PDU event. */
+ if (garp_pdu_append_attr(app, attr, GARP_JOIN_IN) < 0)
+ return;
break;
case GARP_ACTION_S_LEAVE_EMPTY:
garp_pdu_append_attr(app, attr, GARP_LEAVE_EMPTY);