wlan: Add NULL check before dereferencing dev pointer

During SAP loading when changing interface from INFRA to SAP mode
dev will be initialized to NULL and if at the same time driver
unload is triggered then there is a race-condition causing NULL
pointer dereference.
Hence add NULL check before dereferencing dev pointer.

Change-Id: Ic29b71e2a990de12880fe773582c65f9ca359c72
CRs-Fixed: 784403
1 file changed
tree: 5fb3018077cb73852a688142d6bc61b12a4562cf
  1. CORE/
  2. firmware_bin/
  3. riva/
  4. Android.mk
  5. Kbuild
  6. Kconfig
  7. Makefile