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| Filename | Latest commit message | Latest commit date |
|---|---|---|
f596c8844f
The implementation is broken in all the ways the unit test did not touch:
1/ The local definition of in_buf and in_obj violated C99 initializer
expectations for zeroing. By only initializing 2 out of the three
struct members the compiler was free to zero-initialize the remaining
entry even though the aliased location in the union was initialized.
2/ The implementation made assumptions about the state of the 'smart'
payload after command execution that are satisfied by
acpi_nfit_ctl(), but not acpi_evaluate_dsm().
3/ populate_shutdown_status() is skipped on Intel NVDIMMs due to the early
return for skipping the common _LS{I,R,W} enabling.
4/ The input length should be zero.
This breakage was missed due to the unit test implementation only
testing the case where nfit_intel_shutdown_status() returns a valid
payload.
Much of this complexity would be saved if acpi_nfit_ctl() could be used, but
that currently requires a 'struct nvdimm *' argument and one is not created
until later in the init process. The health result is needed before the device
is created because the payload gates whether the nmemX/nfit/dirty_shutdown
property is visible in sysfs.
Cc: <stable@vger.kernel.org>
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 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.