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commit102e9d1936upstream. pm_runtime usage_count counter is not well managed. pm_runtime_put_autosuspend callback drops the usage_counter but this one has never been increased. Add pm_runtime_get_sync callback to bump up the usage counter. It is also needed to use pm_runtime_force_suspend and pm_runtime_force_resume APIs to handle properly the clock. Fixes:9d282c17b0("spi: stm32-qspi: Add pm_runtime support") Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210419121541.11617-2-patrice.chotard@foss.st.com Signed-off-by: Mark Brown <broonie@kernel.org> 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.