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>
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index ac4e8b8..621baa5 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -611,20 +611,23 @@
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 @@
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 @@
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 @@
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 @@
kfree(npinfo);
np->dev = NULL;
dev_put(ndev);
- return -1;
+ return err;
}
static int __init netpoll_init(void) {