a2d4f1e7f9
The TZ governor start can be invoked through the sysfs governor store() operation. This opens up a possible race when user space tries to set the same governor operation twice leading to calling the TZ governors tz_handler() in succession. While the first one goes through successfully and queues the work for starting the bandwidth governor, before the work gets to run, the second invocation of the tz_handler reinitializes the work. This causes the internal state of the work item to be reset causing a crash in the kernel workqueue handler. This patch tries to address this problem by not allowing the tz_handler() to run the next time, if the first invocation was already successful and potentially in progress. Change-Id: Id2d6b9f680c873937a64eeb483ce8359306cd7b0 Signed-off-by: Sharat Masetty <smasetty@codeaurora.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.
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.