diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-08-28 21:17:56 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-08-28 21:17:56 +0200 |
| commit | 4f31d53c21ec98a2c8973cff759804bd1c217c93 (patch) | |
| tree | d57725b9aafc41c2f1ac71d4e7a27d29efc09bde | |
| parent | 6556b0a8ef3a51ade1f772ff58807de463fc1b58 (diff) | |
| parent | 33f61d725a86e9ae02bf504e9372ba973c010ddc (diff) | |
Merge branch 'acpi-mm'
* acpi-mm:
ACPI: OSL: Prevent acpi_release_memory() from returning too early
ACPI: ioremap: avoid redundant rounding to OS page size
| -rw-r--r-- | drivers/acpi/osl.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 6ad8cb05f672..4a0b07792233 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -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); |