rxrpc: Fix the parsing of soft-ACKs

The soft-ACK parser doesn't increment the pointer into the soft-ACK list,
resulting in the first ACK/NACK value being applied to all the relevant
packets in the Tx queue.  This has the potential to miss retransmissions
and cause excessive retransmissions.

Fix this by incrementing the pointer.

Signed-off-by: David Howells <dhowells@redhat.com>

diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index f0d9115b9b7e10fb85ebcfe94c9b0dfc04add129..c1f83d22f9b795beee015614fc00b7c8d5e7016d 100644 (file)
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -384,7 +384,7 @@ static void rxrpc_input_soft_acks(struct rxrpc_call *call, u8 *acks,
 
        for (; nr_acks > 0; nr_acks--, seq++) {
                ix = seq & RXRPC_RXTX_BUFF_MASK;
-               switch (*acks) {
+               switch (*acks++) {
                case RXRPC_ACK_TYPE_ACK:
                        call->rxtx_annotations[ix] = RXRPC_TX_ANNO_ACK;
                        break;