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nfit: fix region registration vs block-data-window ranges

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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>
This commit is contained in:
Dan Williams 2018-04-02 16:49:30 -07:00 committed by Greg Kroah-Hartman
parent c3530143fe
commit 768fce4422
1 changed files with 14 additions and 8 deletions
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22
drivers/acpi/nfit/core.c
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@ -2547,15 +2547,21 @@ 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;
}
queue_work(nfit_wq, &acpi_desc->work);
return 0;