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The stm32_sdmmc variant has build-in support for datatimeout for R1B requests. If a corresponding IRQ is raised, this triggers the DPSM to stay busy and remains in a non-functional state. Only a reset can bring it back to a functional state. Because a reset must be issued from non-atomic context, let's defer this to be managed from a threaded IRQ handler. Besides the reset, the threaded handler also calls mmc_request_done(), to finally complete the request. Signed-off-by: Ludovic Barre <ludovic.barre@st.com> Link: https://lore.kernel.org/r/20191211133934.16932-1-ludovic.Barre@st.com [Ulf: A few minor updates to the changelog/comments] Signed-off-by: Ulf Hansson <ulf.hansson@linaro.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.