diff options
| author |   Patrick McHardy <kaber@trash.net> | 2007-06-13 12:06:43 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@sunset.davemloft.net> | 2007-07-10 22:14:59 -0700 |
| commit | 2ae0bf69b716d07126f0a9c17fcc2d76da172cb6 (patch) | |
| tree | a7cbfcbfa3e5fe95ae77e1fc0a73745f657edf7a /net/8021q/vlan.c | |
| parent | [VLAN]: Move device registation to seperate function (diff) | |
| download | linux-dev-2ae0bf69b716d07126f0a9c17fcc2d76da172cb6.tar.xz linux-dev-2ae0bf69b716d07126f0a9c17fcc2d76da172cb6.zip | |
[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 <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/8021q/vlan.c')
| -rw-r--r-- | 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 e68b503f1012..5801993182b4 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -493,14 +493,14 @@ 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", @@ -508,10 +508,11 @@ 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 @@ -547,7 +548,7 @@ static struct net_device *register_vlan_device(struct net_device *real_dev, vlan_setup); if (new_dev == NULL) - goto out_ret_null; + return -ENOBUFS; /* need 4 bytes for extra VLAN header info, * hope the underlying device can handle it. @@ -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: |