Phonet: restore flow control credits when sending fails
This patch restores the below flow control patch submitted by Rémi
Denis-Courmont, which accidentaly got lost due to Pipe controller patch
on Phonet.
commit 1a98214feef2221cd7c24b17cd688a5a9d85b2ea
Author: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Date: Mon Aug 30 12:57:03 2010 +0000
Phonet: restore flow control credits when sending fails
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/phonet/pep.c b/net/phonet/pep.c
index 7bf23cf..552fb66 100644
--- a/net/phonet/pep.c
+++ b/net/phonet/pep.c
@@ -1288,6 +1288,7 @@
{
struct pep_sock *pn = pep_sk(sk);
struct pnpipehdr *ph;
+ int err;
#ifdef CONFIG_PHONET_PIPECTRLR
struct sockaddr_pn spn = {
.spn_family = AF_PHONET,
@@ -1314,10 +1315,15 @@
ph->message_id = PNS_PIPE_DATA;
ph->pipe_handle = pn->pipe_handle;
#ifdef CONFIG_PHONET_PIPECTRLR
- return pn_skb_send(sk, skb, &spn);
+ err = pn_skb_send(sk, skb, &spn);
#else
- return pn_skb_send(sk, skb, &pipe_srv);
+ err = pn_skb_send(sk, skb, &pipe_srv);
#endif
+
+ if (err && pn_flow_safe(pn->tx_fc))
+ atomic_inc(&pn->tx_credits);
+ return err;
+
}
static int pep_sendmsg(struct kiocb *iocb, struct sock *sk,