[VLAN]: Return proper error codes in register_vlan_device
The returned device is unused, return proper error codes instead and avoid
having the ioctl handler guess the error.
Signed-off-by: Patrick McHardy <[EMAIL PROTECTED]>
---
commit f2eb0828c4cfaf4d4aed225b55ca65b052109657
tree 967dc78c7ed8931a62bdaaa0e57304e75bfe91b9
parent 312dc0ee04bed170ad8091f777fcc2108105ca2c
author Patrick McHardy <[EMAIL PROTECTED]> Tue, 05 Jun 2007 16:33:45 +0200
committer Patrick McHardy <[EMAIL PROTECTED]> Tue, 05 Jun 2007 16:33:45 +0200
net/8021q/vlan.c | 32 ++++++++++++++------------------
1 files changed, 14 insertions(+), 18 deletions(-)
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 0fa071d..03b67b9 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -498,14 +498,14 @@ out_free_group:
}
/* Attach a VLAN device to a mac address (ie Ethernet Card).
- * Returns the device that was created, or NULL if there was
- * an error of some kind.
+ * Returns 0 if the device was created or a negative error code otherwise.
*/
-static struct net_device *register_vlan_device(struct net_device *real_dev,
- unsigned short VLAN_ID)
+static int register_vlan_device(struct net_device *real_dev,
+ unsigned short VLAN_ID)
{
struct net_device *new_dev;
char name[IFNAMSIZ];
+ int err;
#ifdef VLAN_DEBUG
printk(VLAN_DBG "%s: if_name -:%s:- vid: %i\n",
@@ -513,10 +513,11 @@ static struct net_device *register_vlan_device(struct
net_device *real_dev,
#endif
if (VLAN_ID > VLAN_VID_MASK)
- goto out_ret_null;
+ return -ERANGE;
- if (vlan_check_real_dev(real_dev, VLAN_ID) < 0)
- goto out_ret_null;
+ err = vlan_check_real_dev(real_dev, VLAN_ID);
+ if (err < 0)
+ return err;
/* Gotta set up the fields for the device. */
#ifdef VLAN_DEBUG
@@ -552,7 +553,7 @@ static struct net_device *register_vlan_device(struct
net_device *real_dev,
vlan_setup);
if (new_dev == NULL)
- goto out_ret_null;
+ return -ENOBUFS;
#ifdef VLAN_DEBUG
printk(VLAN_DBG "Allocated new name -:%s:-\n", new_dev->name);
@@ -566,7 +567,8 @@ static struct net_device *register_vlan_device(struct
net_device *real_dev,
VLAN_DEV_INFO(new_dev)->dent = NULL;
VLAN_DEV_INFO(new_dev)->flags = 1;
- if (register_vlan_dev(new_dev) < 0)
+ err = register_vlan_dev(new_dev);
+ if (err < 0)
goto out_free_newdev;
/* Account for reference in struct vlan_dev_info */
@@ -574,13 +576,11 @@ static struct net_device *register_vlan_device(struct
net_device *real_dev,
#ifdef VLAN_DEBUG
printk(VLAN_DBG "Allocated new device successfully, returning.\n");
#endif
- return new_dev;
+ return 0;
out_free_newdev:
free_netdev(new_dev);
-
-out_ret_null:
- return NULL;
+ return err;
}
static int vlan_device_event(struct notifier_block *unused, unsigned long
event, void *ptr)
@@ -753,11 +753,7 @@ static int vlan_ioctl_handler(void __user *arg)
err = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
- if (register_vlan_device(dev, args.u.VID)) {
- err = 0;
- } else {
- err = -EINVAL;
- }
+ err = register_vlan_device(dev, args.u.VID);
break;
case DEL_VLAN_CMD:
-
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