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-rw-r--r--drivers/net/wan/dlci.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/wan/dlci.c b/drivers/net/wan/dlci.c
index 1f6e0538c716..6a8a382c5f4c 100644
--- a/drivers/net/wan/dlci.c
+++ b/drivers/net/wan/dlci.c
@@ -384,6 +384,7 @@ static int dlci_del(struct dlci_add *dlci)
struct frad_local *flp;
struct net_device *master, *slave;
int err;
+ bool found = false;
rtnl_lock();
@@ -394,6 +395,17 @@ static int dlci_del(struct dlci_add *dlci)
goto out;
}
+ list_for_each_entry(dlp, &dlci_devs, list) {
+ if (dlp->master == master) {
+ found = true;
+ break;
+ }
+ }
+ if (!found) {
+ err = -ENODEV;
+ goto out;
+ }
+
if (netif_running(master)) {
err = -EBUSY;
goto out;