diff options
| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2010-08-16 23:45:54 +0200 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2010-08-19 20:28:25 +0200 |
| commit | 1bf145fed572583d4cb7c1784689a0b42c997ba6 (patch) | |
| tree | 3ef524b2af2ea77f2ea99478b8a4058a8cf07d13 | |
| parent | a481e97d3cdc40b9d58271675bd4f0abb79d4872 (diff) | |
firewire: net: fix unicast reception RCODE in failure paths
The incoming request hander fwnet_receive_packet() expects subsequent
datagram handling code to return non-zero on errors. However, almost
none of the failure paths did so. Fix them all.
(This error reporting is used to send and RCODE_CONFLICT_ERROR to the
sender node in such failure cases. Two modes of failure exist: Out of
memory, or firewire-net is unaware of any peer node to which a fragment
or an ARP packet belongs. However, it is unclear whether a sender can
actually make use of such information. A Linux peer apparently can't.
Maybe it should all be simplified to void functions.)
Reported-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
| -rw-r--r-- | drivers/firewire/net.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/drivers/firewire/net.c b/drivers/firewire/net.c index da17d409a24..33f8421c71c 100644 --- a/drivers/firewire/net.c +++ b/drivers/firewire/net.c @@ -579,7 +579,7 @@ static int fwnet_finish_incoming_packet(struct net_device *net, if (!peer) { fw_notify("No peer for ARP packet from %016llx\n", (unsigned long long)peer_guid); - goto failed_proto; + goto no_peer; } /* @@ -656,7 +656,7 @@ static int fwnet_finish_incoming_packet(struct net_device *net, return 0; - failed_proto: + no_peer: net->stats.rx_errors++; net->stats.rx_dropped++; @@ -664,7 +664,7 @@ static int fwnet_finish_incoming_packet(struct net_device *net, if (netif_queue_stopped(net)) netif_wake_queue(net); - return 0; + return -ENOENT; } static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, @@ -701,7 +701,7 @@ static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, fw_error("out of memory\n"); net->stats.rx_dropped++; - return -1; + return -ENOMEM; } skb_reserve(skb, (net->hard_header_len + 15) & ~15); memcpy(skb_put(skb, len), buf, len); @@ -726,8 +726,10 @@ static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, spin_lock_irqsave(&dev->lock, flags); peer = fwnet_peer_find_by_node_id(dev, source_node_id, generation); - if (!peer) - goto bad_proto; + if (!peer) { + retval = -ENOENT; + goto fail; + } pd = fwnet_pd_find(peer, datagram_label); if (pd == NULL) { @@ -741,7 +743,7 @@ static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, dg_size, buf, fg_off, len); if (pd == NULL) { retval = -ENOMEM; - goto bad_proto; + goto fail; } peer->pdg_size++; } else { @@ -755,9 +757,9 @@ static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, pd = fwnet_pd_new(net, peer, datagram_label, dg_size, buf, fg_off, len); if (pd == NULL) { - retval = -ENOMEM; peer->pdg_size--; - goto bad_proto; + retval = -ENOMEM; + goto fail; } } else { if (!fwnet_pd_update(peer, pd, buf, fg_off, len)) { @@ -768,7 +770,8 @@ static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, */ fwnet_pd_delete(pd); peer->pdg_size--; - goto bad_proto; + retval = -ENOMEM; + goto fail; } } } /* new datagram or add to existing one */ @@ -794,14 +797,13 @@ static int fwnet_incoming_packet(struct fwnet_device *dev, __be32 *buf, int len, spin_unlock_irqrestore(&dev->lock, flags); return 0; - - bad_proto: + fail: spin_unlock_irqrestore(&dev->lock, flags); if (netif_queue_stopped(net)) netif_wake_queue(net); - return 0; + return retval; } static void fwnet_receive_packet(struct fw_card *card, struct fw_request *r, |