b0fcdffdd6
Because of UCSI, we have to support alt mode enter/exit reporting even when there is no alt mode driver bind to the alt mode device. With UCSI a firmware handles the alternate modes, and the modes are entered automatically from OS PoW. Changing typec_altmode_update_active() so that the driver module ref count is incremented/decremented only if there really is a driver for the alt mode. That avoids a NULL pointer dereference from happening when the driver is missing. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.