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authorStephen Hemminger <shemminger@osdl.org>2006-10-27 00:46:52 +0200
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-03 06:22:34 +0100
commitb41848b61bae30e3661efd4ec62ea380cedef687 (patch)
tree76d671dd1553be6f8355edbc344306f6d0d2ae72
parentnetpoll per device txq (diff)
downloadlinux-b41848b61bae30e3661efd4ec62ea380cedef687.tar.xz
linux-b41848b61bae30e3661efd4ec62ea380cedef687.zip
netpoll setup error handling
The beast was not always healthy. When it was sick, it tended to be laconic and not tell anyone the real problem. A few small changes had it telling the world about its problems, if they really wanted to hear. Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
-rw-r--r--drivers/net/netconsole.c7
-rw-r--r--net/core/netpoll.c20
2 files changed, 18 insertions, 9 deletions
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index bf58db29e2ed..e6e8a9797b6d 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -102,6 +102,8 @@ __setup("netconsole=", option_setup);
static int init_netconsole(void)
{
+ int err;
+
if(strlen(config))
option_setup(config);
@@ -110,8 +112,9 @@ static int init_netconsole(void)
return 0;
}
- if(netpoll_setup(&np))
- return -EINVAL;
+ err = netpoll_setup(&np);
+ if (err)
+ return err;
register_console(&netconsole);
printk(KERN_INFO "netconsole: network logging started\n");
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index ac4e8b8f57d1..621baa5da49f 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -611,20 +611,23 @@ int netpoll_setup(struct netpoll *np)
struct in_device *in_dev;
struct netpoll_info *npinfo;
unsigned long flags;
+ int err;
if (np->dev_name)
ndev = dev_get_by_name(np->dev_name);
if (!ndev) {
printk(KERN_ERR "%s: %s doesn't exist, aborting.\n",
np->name, np->dev_name);
- return -1;
+ return -ENODEV;
}
np->dev = ndev;
if (!ndev->npinfo) {
npinfo = kmalloc(sizeof(*npinfo), GFP_KERNEL);
- if (!npinfo)
+ if (!npinfo) {
+ err = -ENOMEM;
goto release;
+ }
npinfo->rx_flags = 0;
npinfo->rx_np = NULL;
@@ -645,6 +648,7 @@ int netpoll_setup(struct netpoll *np)
if (!ndev->poll_controller) {
printk(KERN_ERR "%s: %s doesn't support polling, aborting.\n",
np->name, np->dev_name);
+ err = -ENOTSUPP;
goto release;
}
@@ -655,13 +659,14 @@ int netpoll_setup(struct netpoll *np)
np->name, np->dev_name);
rtnl_lock();
- if (dev_change_flags(ndev, ndev->flags | IFF_UP) < 0) {
+ err = dev_open(ndev);
+ rtnl_unlock();
+
+ if (err) {
printk(KERN_ERR "%s: failed to open %s\n",
- np->name, np->dev_name);
- rtnl_unlock();
+ np->name, ndev->name);
goto release;
}
- rtnl_unlock();
atleast = jiffies + HZ/10;
atmost = jiffies + 4*HZ;
@@ -699,6 +704,7 @@ int netpoll_setup(struct netpoll *np)
rcu_read_unlock();
printk(KERN_ERR "%s: no IP address for %s, aborting\n",
np->name, np->dev_name);
+ err = -EDESTADDRREQ;
goto release;
}
@@ -731,7 +737,7 @@ int netpoll_setup(struct netpoll *np)
kfree(npinfo);
np->dev = NULL;
dev_put(ndev);
- return -1;
+ return err;
}
static int __init netpoll_init(void) {