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After switching to a new channel, driver schedules session protection time event in order to hear the beacon on the new channel. The duration of the protection is two beacon intervals. However, since we start to switch slightly before beacon with count 1, in case we don't hear (or AP doesn't transmit) the very first beacon on the new channel the protection ends without hearing any beacon at all. At this stage the switch is not complete, the queues are closed and the interface doesn't have quota yet or TBTT events. As the result, we are stuck forever waiting for iwl_mvm_post_channel_switch() to be called. Fix this by increasing the protection time to be 3 beacon intervals and in addition drop the connection if the time event ends before we got any beacon. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.