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| author | Dan Williams <dan.j.williams@intel.com> | 2019-01-19 17:45:56 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2019-01-21 18:57:43 +0100 |
| commit | 1cd7386549f9b6f2f230da54aa9e7fe2d6c216d2 (patch) | |
| tree | 527eed888a48757834f6a672cbb034a1bb67e547 /drivers/acpi | |
| parent | nfit_test: fix security state pull for nvdimm security nfit_test (diff) | |
| download | linux-1cd7386549f9b6f2f230da54aa9e7fe2d6c216d2.tar.xz linux-1cd7386549f9b6f2f230da54aa9e7fe2d6c216d2.zip | |
libnvdimm/security: Require nvdimm_security_setup_events() to succeed
The following warning:
ACPI0012:00: security event setup failed: -19
...is meant to capture exceptional failures of sysfs_get_dirent(),
however it will also fail in the common case when security support is
disabled. A few issues:
1/ A dev_warn() report for a common case is too chatty
2/ The setup of this notifier is generic, no need for it to be driven
from the nfit driver, it can exist completely in the core.
3/ If it fails for any reason besides security support being disabled,
that's fatal and should abort DIMM activation. Userspace may hang if
it never gets overwrite notifications.
4/ The dirent needs to be released.
Move the call to the core 'dimm' driver, make it conditional on security
support being active, make it fatal for the exceptional case, add the
missing sysfs_put() at device disable time.
Fixes: 7d988097c546 ("...Add security DSM overwrite support")
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/nfit/core.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index 5143e11e3b0f..c1fb06654749 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -2042,11 +2042,6 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc) if (!nvdimm) continue; - rc = nvdimm_security_setup_events(nvdimm); - if (rc < 0) - dev_warn(acpi_desc->dev, - "security event setup failed: %d\n", rc); - nfit_kernfs = sysfs_get_dirent(nvdimm_kobj(nvdimm)->sd, "nfit"); if (nfit_kernfs) nfit_mem->flags_attr = sysfs_get_dirent(nfit_kernfs, |