diff options
Diffstat (limited to 'drivers/dahdi/xpp')
| -rwxr-xr-x | drivers/dahdi/xpp/init_card_4_30 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/dahdi/xpp/init_card_4_30 b/drivers/dahdi/xpp/init_card_4_30 index 2f0a79d..d70cfdc 100755 --- a/drivers/dahdi/xpp/init_card_4_30 +++ b/drivers/dahdi/xpp/init_card_4_30 @@ -348,6 +348,11 @@ sub port_setup($) { } else { my $file = sprintf "/sys/bus/xpds/devices/%02d:%1d:%1d/pri_protocol", $ENV{XBUS_NUMBER}, $ENV{UNIT_NUMBER}, $portno; + # The 'open' will fail if the port does not exist. + # (or rather: the XPD for it does not exist). While + # we only read this file to get the default E1/T1 value, + # if it does not exist, it also implies the commands sent would + # get nowhere. So we might as well quit now. open(F, $file) || return; $sysfs_pri_protocol = <F>; close F; |