On 4/2/2018 9:46 PM, Dan Williams wrote:
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@xxxxxxxxxxxxxxx>
Fixes: 1cf03c00e7c1 ("nfit: scrub and register regions in a workqueue")
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx>
---
drivers/acpi/nfit/core.c | 22 ++++++++++++++--------
1 file changed, 14 insertions(+), 8 deletions(-)
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 12fb414fa678..ea9f3e727fef 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -3018,15 +3018,21 @@ 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)
--
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