diff options
| -rw-r--r-- | kernel/resource.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/resource.c b/kernel/resource.c index b0fbf685c77a..915c02e8e5dd 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -1256,6 +1256,21 @@ int release_mem_region_adjustable(struct resource *parent, continue; } + /* + * All memory regions added from memory-hotplug path have the + * flag IORESOURCE_SYSTEM_RAM. If the resource does not have + * this flag, we know that we are dealing with a resource coming + * from HMM/devm. HMM/devm use another mechanism to add/release + * a resource. This goes via devm_request_mem_region and + * devm_release_mem_region. + * HMM/devm take care to release their resources when they want, + * so if we are dealing with them, let us just back off here. + */ + if (!(res->flags & IORESOURCE_SYSRAM)) { + ret = 0; + break; + } + if (!(res->flags & IORESOURCE_MEM)) break; |