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Merge branch 'acpi-mm'

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* acpi-mm:
  ACPI: OSL: Prevent acpi_release_memory() from returning too early
  ACPI: ioremap: avoid redundant rounding to OS page size
This commit is contained in:
Rafael J. Wysocki 2020-08-28 21:17:56 +02:00
commit 4f31d53c21
1 changed files with 19 additions and 4 deletions
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23
drivers/acpi/osl.c
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@ -350,7 +350,7 @@ void __iomem __ref
pg_off = round_down(phys, PAGE_SIZE);
pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
virt = acpi_map(pg_off, pg_sz);
virt = acpi_map(phys, size);
if (!virt) {
mutex_unlock(&acpi_ioremap_lock);
kfree(map);
@ -358,7 +358,7 @@ void __iomem __ref
}
INIT_LIST_HEAD(&map->list);
map->virt = virt;
map->virt = (void __iomem __force *)((unsigned long)virt & PAGE_MASK);
map->phys = pg_off;
map->size = pg_sz;
map->track.refcount = 1;
@ -1575,11 +1575,26 @@ static acpi_status acpi_deactivate_mem_region(acpi_handle handle, u32 level,
acpi_status acpi_release_memory(acpi_handle handle, struct resource *res,
u32 level)
{
acpi_status status;
if (!(res->flags & IORESOURCE_MEM))
return AE_TYPE;
return acpi_walk_namespace(ACPI_TYPE_REGION, handle, level,
acpi_deactivate_mem_region, NULL, res, NULL);
status = acpi_walk_namespace(ACPI_TYPE_REGION, handle, level,
acpi_deactivate_mem_region, NULL,
res, NULL);
if (ACPI_FAILURE(status))
return status;
/*
* Wait for all of the mappings queued up for removal by
* acpi_deactivate_mem_region() to actually go away.
*/
synchronize_rcu();
rcu_barrier();
flush_scheduled_work();
return AE_OK;
}
EXPORT_SYMBOL_GPL(acpi_release_memory);