This provides safety against negative optlen at the type
level instead of depending upon (sometimes non-trivial)
checks against this sprinkled all over the the place, in
each and every implementation.

Based upon work done by Arjan van de Ven and feedback
from Linus Torvalds.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch make debug printk's KERN_DEBUG and also fix some
codestyle issues.
Signed-off-by: NKarsten Keil <keil@b1-systems.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If the channel receive function returns an error the skb must be freed.
Signed-off-by: NKarsten Keil <keil@b1-systems.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add IMHOLD_L1 ioctl.
The feature will be disabled on closing.
Signed-off-by: NAndreas Eversberg <andreas@eversberg.eu>
Signed-off-by: NKarsten Keil <keil@b1-systems.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Correct busy device detection.
This fix belongs to last commit.
Signed-off-by: NAndreas Eversberg <andreas@eversberg.eu>
Signed-off-by: NKarsten Keil <kkeil@suse.de>

 Added GETPEER operation.
 Socket now checks if device is already busy at a differen mode.
Signed-off-by: NAndreas Eversberg <andreas@eversberg.eu>
Signed-off-by: NKarsten Keil <kkeil@suse.de>

struct device already has a 'name' member, use it.
Signed-off-by: NMatthias Urlichs <matthias@urlichs.de>
Signed-off-by: NKarsten Keil <kkeil@suse.de>

To get persistent device names with hotplug we need to rename devices
sometime.
Signed-off-by: NMatthias Urlichs <matthias@urlichs.de>
Signed-off-by: NKarsten Keil <kkeil@suse.de>

Impact: change data type for variable 'debug' from *int to *u_int,
same for the argument type of mISDN_inittimer

In "core.h" mISDN_inittimer is declared with the argument type "*u_int", make
the definition in "timerdev.c" match this.

This fixes also this warnings:

  drivers/isdn/mISDN/layer1.c:391:8: warning: incorrect type in assignment (different signedness)
  drivers/isdn/mISDN/layer1.c:391:8:    expected int *static [toplevel] debug
  drivers/isdn/mISDN/layer1.c:391:8:    got unsigned int [usertype] *deb
  drivers/isdn/mISDN/layer2.c:2200:8: warning: incorrect type in assignment (different signedness)
  drivers/isdn/mISDN/layer2.c:2200:8:    expected int *static [toplevel] debug
  drivers/isdn/mISDN/layer2.c:2200:8:    got unsigned int [usertype] *deb
  drivers/isdn/mISDN/socket.c:769:8: warning: incorrect type in assignment (different signedness)
  drivers/isdn/mISDN/socket.c:769:8:    expected int *static [toplevel] debug
  drivers/isdn/mISDN/socket.c:769:8:    got unsigned int [usertype] *deb
Signed-off-by: NHannes Eder <hannes@hanneseder.net>
Acked-by: NKarsten Keil <kkeil@suse.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The channelmap should have the same size on 32 and 64 bit systems
and should not depend on endianess.
Thanks to David Woodhouse for spotting this.
Signed-off-by: NKarsten Keil <kkeil@suse.de>

Add mISDN core files
Signed-off-by: NKarsten Keil <kkeil@suse.de>