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i4l: do not print a warning when shutting down an i4l ppp interface

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When an i4l ppp interface is shut down (e.g. with /sbin/ifdown ippp0) a
scary warning is logged:
    
    isdn_free_channel: called with invalid drv(-1) or channel(-1)
    
This warning is caused by isdn_net_unbind_channel(), which always calls
isdn_free_channel() even if isdn_net_local->isdn_device and
isdn_net_local->isdn_channel are (still) in a perfectly acceptable
default state, so let's not do that.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Bolle 2009-01-14 14:41:00 -08:00 committed by David S. Miller
parent f0d44ae310
commit bae5843160
1 changed files with 3 additions and 1 deletions
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4
drivers/isdn/i4l/isdn_net.c
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@ -292,7 +292,9 @@ isdn_net_unbind_channel(isdn_net_local * lp)
lp->dialstate = 0;
dev->rx_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
dev->st_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
isdn_free_channel(lp->isdn_device, lp->isdn_channel, ISDN_USAGE_NET);
if (lp->isdn_device != -1 && lp->isdn_channel != -1)
isdn_free_channel(lp->isdn_device, lp->isdn_channel,
ISDN_USAGE_NET);
lp->flags &= ~ISDN_NET_CONNECTED;
lp->isdn_device = -1;
lp->isdn_channel = -1;