wlan: Validate timer callbacks for NULL pointer de-reference

Address possible kernel panics due to NULL pointer de-references
in  timer callbacks during load/unload or SSR by validating the
context for same.

Change-Id: I6333eb132e893b191dd1f2ec11902457b7fb565c
CRs-Fixed: 805636
7 files changed
tree: ac521075cb29be29bc8a9dabdb1e77f4ca1947de
  1. CORE/
  2. firmware_bin/
  3. riva/
  4. Android.mk
  5. Kbuild
  6. Kconfig
  7. Makefile