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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-09 22:27:22 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-09 22:27:22 +0300 |
| commit | 810ac7b7558d7830e72d8dbf34b851fce39e08b0 (patch) | |
| tree | 5c026763a237ab9d7940d83deb9b719fb6247d42 /kernel | |
| parent | 861d75d098e2d0a2d7692c9d6a30b6fd2c81387c (diff) | |
| parent | 325896ffdf90f7cbd59fb873b7ba20d60d1ddf3c (diff) | |
| download | linux-810ac7b7558d7830e72d8dbf34b851fce39e08b0.tar.xz | |
Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams:
"Several fixes to the DSM (ACPI device specific method) marshaling
implementation.
I consider these urgent enough to send for 4.9 consideration since
they fix the kernel's handling of ARS (Address Range Scrub) commands.
Especially for platforms without machine-check-recovery capabilities,
successful execution of ARS commands enables the platform to
potentially break out of an infinite reboot problem if a media error
is present in the boot path. There is also a one line fix for a
device-dax read-only mapping regression.
Commits 9a901f5495e2 ("acpi, nfit: fix extended status translations
for ACPI DSMs") and 325896ffdf90 ("device-dax: fix private mapping
restriction, permit read-only") are true regression fixes for changes
introduced this cycle.
Commit efda1b5d87cb ("acpi, nfit, libnvdimm: fix / harden ars_status
output length handling") fixes the kernel's handling of zero-length
results, this never would have worked in the past, but we only just
recently discovered a BIOS implementation that emits this arguably
spec non-compliant result.
The remaining two commits are additional fall out from thinking
through the implications of a zero / truncated length result of the
ARS Status command.
In order to mitigate the risk that these changes introduce yet more
regressions they are backstopped by a new unit test in commit
a7de92dac9f0 ("tools/testing/nvdimm: unit test acpi_nfit_ctl()") that
mocks up inputs to acpi_nfit_ctl()"
* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
device-dax: fix private mapping restriction, permit read-only
tools/testing/nvdimm: unit test acpi_nfit_ctl()
acpi, nfit: fix bus vs dimm confusion in xlat_status
acpi, nfit: validate ars_status output buffer size
acpi, nfit, libnvdimm: fix / harden ars_status output length handling
acpi, nfit: fix extended status translations for ACPI DSMs
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions