rxrpc: Allow tx_winsize to grow in response to an ACK
Allow tx_winsize to grow when the ACK info packet shows a larger receive
window at the other end rather than only permitting it to shrink.
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 5958ef8..8e529af 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -333,14 +333,16 @@
struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
struct rxrpc_peer *peer;
unsigned int mtu;
+ u32 rwind = ntohl(ackinfo->rwind);
_proto("Rx ACK %%%u Info { rx=%u max=%u rwin=%u jm=%u }",
sp->hdr.serial,
ntohl(ackinfo->rxMTU), ntohl(ackinfo->maxMTU),
- ntohl(ackinfo->rwind), ntohl(ackinfo->jumbo_max));
+ rwind, ntohl(ackinfo->jumbo_max));
- if (call->tx_winsize > ntohl(ackinfo->rwind))
- call->tx_winsize = ntohl(ackinfo->rwind);
+ if (rwind > RXRPC_RXTX_BUFF_SIZE - 1)
+ rwind = RXRPC_RXTX_BUFF_SIZE - 1;
+ call->tx_winsize = rwind;
mtu = min(ntohl(ackinfo->rxMTU), ntohl(ackinfo->maxMTU));