IPACM: prevent crash if iface not register Tx/Rx property

In customer build which rndis-driver didn't register Tx/Rx
property in IPA-HW, ipacm still adding/deleting dependecny
in IPA-HW for usb-tethering which cause SIGSEGV error in
kernel dmesg and ipacm crashed. The fix is to check the
netdev iface having Tx/Rx property first, then add/delete
IPA_RM dependency in kernel.

Change-Id: I0653160485b3f41c34561952ae6f47c8abeeb651
2 files changed
tree: ab63f528f0cd3f8902936b4da5dff59184ac0d89
  1. ipacm/
  2. ipanat/
  3. configure.ac
  4. Makefile.am