I had the same problem, and i should reboot the system to get wireless to work.
But now every time wireless stops working, I just enter these commands:
$ sudo rmmod iwlagn
$ sudo rmmod iwlcore
$ sudo modprobe iwlcore
$ sudo modprobe iwlagn
and it gets back to work.
I hope it work for you too.
I had the same problem, and i should reboot the system to get wireless to work.
But now every time wireless stops working, I just enter these commands:
$ sudo rmmod iwlagn
$ sudo rmmod iwlcore
$ sudo modprobe iwlcore
$ sudo modprobe iwlagn
and it gets back to work.
I hope it work for you too.