Integration testing with a BIOS that generates injected health event notifications fails to communicate those events to userspace. The nfit driver neglects to link the ACPI DIMM device with the necessary driver data so acpi_nvdimm_notify() fails this lookup:

nfit_mem = dev_get_drvdata(dev); if (nfit_mem && nfit_mem->flags_attr) sysfs_notify_dirent(nfit_mem->flags_attr);

Add the necessary linkage when installing the notification handler and clean it up when the nfit driver instance is torn down.

Cc: stable@vger.kernel.org Cc: Toshi Kani toshi.kani@hpe.com Cc: Vishal Verma vishal.l.verma@intel.com Fixes: ba9c8dd3c222 ("acpi, nfit: add dimm device notification support") Reported-by: Daniel Osawa daniel.k.osawa@intel.com Signed-off-by: Dan Williams dan.j.williams@intel.com --- drivers/acpi/nfit/core.c | 6 ++++++ 1 file changed, 6 insertions(+)

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index ff2580e7611d..947ea8a92761 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -1670,6 +1670,11 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, dev_name(&adev_dimm->dev)); return -ENXIO; } + /* + * Record nfit_mem for the notification path to track back to + * the nfit sysfs attributes for this dimm device object. + */ + dev_set_drvdata(&adev_dimm->dev, nfit_mem);

/* * Until standardization materializes we need to consider 4 @@ -1755,6 +1760,7 @@ static void shutdown_dimm_notify(void *data) if (adev_dimm) acpi_remove_notify_handler(adev_dimm->handle, ACPI_DEVICE_NOTIFY, acpi_nvdimm_notify); + dev_set_drvdata(&adev_dimm->dev, NULL); } mutex_unlock(&acpi_desc->init_mutex); }