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923a6b6984
Any entry point that leads to IPA hardware access must ensure the hardware is operational (clocked). Currently we ensure this by taking an extra clock reference during setup that is not released until we receive a system suspend request. But this extra reference will soon go away. When the platform driver ->probe function is called, we first need hardware access in ipa_config(). Although ipa_config() takes an IPA clock reference, it the special reference taken to prevent suspending the hardware. Have ipa_probe() take a reference before calling ipa_config(), so that the "no-suspend" reference can eventually go away. Drop this reference before ipa_probe() returns. Similarly, the driver ->remove function can be called at any time. Take an IPA clock reference at the beginning of that function, and drop it again after the deconfig stage has completed (at which point hardware access is no longer needed). Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| README | ||
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.