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tipc: fix cancellation of topology subscriptions

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When cancelling a subscription, we have to clear the cancel bit in the
request before iterating over any established subscriptions with memcmp.
Otherwise no subscription will ever be found, and it will not be
possible to explicitly unsubscribe individual subscriptions.

Fixes: 8985ecc7c1 ("tipc: simplify endianness handling in topology subscriber")
Signed-off-by: Erik Hugne <erik.hugne@gmail.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Erik Hugne 2019-03-21 09:11:59 +01:00 committed by David S. Miller
parent 64447506f1
commit 33872d79f5
1 changed files with 1 additions and 0 deletions
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net/tipc/topsrv.c
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@ -363,6 +363,7 @@ static int tipc_conn_rcv_sub(struct tipc_topsrv *srv,
struct tipc_subscription *sub; struct tipc_subscription *sub;
if (tipc_sub_read(s, filter) & TIPC_SUB_CANCEL) { if (tipc_sub_read(s, filter) & TIPC_SUB_CANCEL) {
s->filter &= __constant_ntohl(~TIPC_SUB_CANCEL);
tipc_conn_delete_sub(con, s); tipc_conn_delete_sub(con, s);
return 0; return 0;
} }