53cbba5c8b
In the rare case where spanconfig is called while there is pending data on the hdlc channel, the hdlc_getbuf interrupt could try to read from the hdlc buffer before the channel was fully setup. This could potentially result in a null pointer dereference. This condition has existed since the creation of the wcb4xxp driver. Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com> Signed-off-by: Shaun Ruffell <sruffell@digium.com> Origin: http://svnview.digium.com/svn/dahdi?view=rev&rev=10079 git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/branches/2.4@10080 a0bf4364-ded3-4de4-8d8a-66a801d63aff