diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2018-04-03 02:49:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-19 09:56:18 +0300 |
| commit | 3a6771e2fb321d0ea6004e0314b0aee847a2be7b (patch) | |
| tree | 01114c626f9f7fb1be3f92b88b3600ef848da4a6 /drivers/acpi | |
| parent | 51a9580d67a2e0067262abbb06804b6b45f6aa45 (diff) | |
| download | linux-3a6771e2fb321d0ea6004e0314b0aee847a2be7b.tar.xz | |
nfit: fix region registration vs block-data-window ranges
commit 8d0d8ed3356aa9ed43b819aaedd39b08ca453007 upstream.
Commit 1cf03c00e7c1 "nfit: scrub and register regions in a workqueue"
mistakenly attempts to register a region per BLK aperture. There is
nothing to register for individual apertures as they belong as a set to
a BLK aperture group that are registered with a corresponding
DIMM-control-region. Filter them for registration to prevent some
needless devm_kzalloc() allocations.
Cc: <stable@vger.kernel.org>
Fixes: 1cf03c00e7c1 ("nfit: scrub and register regions in a workqueue")
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/nfit/core.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index f14b4326e855..67a860790560 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -2748,15 +2748,21 @@ static void acpi_nfit_scrub(struct work_struct *work) static int acpi_nfit_register_regions(struct acpi_nfit_desc *acpi_desc) { struct nfit_spa *nfit_spa; - int rc; - list_for_each_entry(nfit_spa, &acpi_desc->spas, list) - if (nfit_spa_type(nfit_spa->spa) == NFIT_SPA_DCR) { - /* BLK regions don't need to wait for ars results */ - rc = acpi_nfit_register_region(acpi_desc, nfit_spa); - if (rc) - return rc; - } + list_for_each_entry(nfit_spa, &acpi_desc->spas, list) { + int rc, type = nfit_spa_type(nfit_spa->spa); + + /* PMEM and VMEM will be registered by the ARS workqueue */ + if (type == NFIT_SPA_PM || type == NFIT_SPA_VOLATILE) + continue; + /* BLK apertures belong to BLK region registration below */ + if (type == NFIT_SPA_BDW) + continue; + /* BLK regions don't need to wait for ARS results */ + rc = acpi_nfit_register_region(acpi_desc, nfit_spa); + if (rc) + return rc; + } acpi_desc->ars_start_flags = 0; if (!acpi_desc->cancel) |