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| author | Dan Williams <dan.j.williams@intel.com> | 2018-03-28 19:44:50 +0200 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-03-28 19:44:50 +0200 |
| commit | 466d1493ea830789a2f063f478aaed2e324f0d3d (patch) | |
| tree | fef630bbda879a29999e7b92d572b372d421c148 /drivers/acpi/nfit/nfit.h | |
| parent | nfit: skip region registration for incomplete control regions (diff) | |
| download | linux-466d1493ea830789a2f063f478aaed2e324f0d3d.tar.xz linux-466d1493ea830789a2f063f478aaed2e324f0d3d.zip | |
acpi, nfit: rework NVDIMM leaf method detection
Some BIOSen do not handle 0-byte transfer lengths for the _LSR and _LSW
(label storage read/write) methods. This causes Linux to fallback to the
deprecated _DSM path, or otherwise disable label support.
Introduce acpi_nvdimm_has_method() to detect whether a method is
available rather than calling the method, require _LSI and _LSR to be
paired, and require read support before enabling write support.
Cc: <stable@vger.kernel.org>
Fixes: 4b27db7e26cd ("acpi, nfit: add support for the _LS...")
Suggested-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/acpi/nfit/nfit.h')
| -rw-r--r-- | drivers/acpi/nfit/nfit.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h index 50d36e166d70..ac9c49463731 100644 --- a/drivers/acpi/nfit/nfit.h +++ b/drivers/acpi/nfit/nfit.h @@ -171,9 +171,8 @@ struct nfit_mem { struct resource *flush_wpq; unsigned long dsm_mask; int family; - u32 has_lsi:1; - u32 has_lsr:1; - u32 has_lsw:1; + bool has_lsr; + bool has_lsw; }; struct acpi_nfit_desc { |