diff options
Diffstat (limited to 'drivers/isdn/mISDN/core.c')
| -rw-r--r-- | drivers/isdn/mISDN/core.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/isdn/mISDN/core.c b/drivers/isdn/mISDN/core.c index a24530f05db0..c401634c00ec 100644 --- a/drivers/isdn/mISDN/core.c +++ b/drivers/isdn/mISDN/core.c @@ -355,6 +355,22 @@ mISDN_unregister_Bprotocol(struct Bprotocol *bp) } EXPORT_SYMBOL(mISDN_unregister_Bprotocol); +static const char *msg_no_channel = "<no channel>"; +static const char *msg_no_stack = "<no stack>"; +static const char *msg_no_stackdev = "<no stack device>"; + +const char *mISDNDevName4ch(struct mISDNchannel *ch) +{ + if (!ch) + return msg_no_channel; + if (!ch->st) + return msg_no_stack; + if (!ch->st->dev) + return msg_no_stackdev; + return dev_name(&ch->st->dev->dev); +}; +EXPORT_SYMBOL(mISDNDevName4ch); + static int mISDNInit(void) { |