commit d1fb62796cdac6899ebd4319e4a610684db063e9
author Allan Stephens <allan.stephens@windriver.com> Fri Sep 03 08:33:42 2010 +0000
committer David S. Miller <davem@davemloft.net> Mon Sep 06 18:12:57 2010 -0700
tree 10cedaa8eb09b412bf229190d5c7089b8f2dd42b
parent 9fbfca013176f9b90d186f3b446fd93e4d972b25

tipc: Fix misleading error code when enabling Ethernet bearers

Cause TIPC to return EAGAIN if it is unable to enable a new Ethernet
bearer because one or more recently disabled Ethernet bearers are
temporarily consuming resources during shut down.  (The previous error
code, EDQUOT, is now returned only if all available Ethernet bearer
data structures are fully enabled at the time the request to enable an
additional bearer is received.)

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/tipc/eth_media.c

diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index 81253d0..673fdf0 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c
@@ -142,6 +142,16 @@
 	struct eth_bearer *eb_ptr = &eth_bearers[0];
 	struct eth_bearer *stop = &eth_bearers[MAX_ETH_BEARERS];
 	char *driver_name = strchr((const char *)tb_ptr->name, ':') + 1;
+	int pending_dev = 0;
+
+	/* Find unused Ethernet bearer structure */
+
+	while (eb_ptr->dev) {
+		if (!eb_ptr->bearer)
+			pending_dev++;
+		if (++eb_ptr == stop)
+			return pending_dev ? -EAGAIN : -EDQUOT;
+	}
 
 	/* Find device with specified name */