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f272210b28
The doorbell feature temporarily overrides the inbound translation to point
to the address stored in epf_test->db_bar.phys_addr, i.e., it calls
set_bar() twice without ever calling clear_bar(), as calling clear_bar()
would clear the BAR's PCI address assigned by the host.
Thus, when disabling the doorbell, restore the inbound translation to point
to the memory allocated for the BAR.
Without this, running the PCI endpoint kselftest doorbell test case more
than once would fail.
Fixes:
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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 reStructuredText 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.