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| author | Yasunori Goto <y-goto@jp.fujitsu.com> | 2006-06-27 02:53:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-27 17:32:35 -0700 |
| commit | dd56a8e36f91f63c0a31e8a118d87b7cf01526b8 (patch) | |
| tree | 70e70c16e460df0b8da151bfff09e6b637c97b10 | |
| parent | 1f425994f96d85540d47eee98daabc1e211b454e (diff) | |
| download | linux-dd56a8e36f91f63c0a31e8a118d87b7cf01526b8.tar.gz linux-dd56a8e36f91f63c0a31e8a118d87b7cf01526b8.tar.bz2 linux-dd56a8e36f91f63c0a31e8a118d87b7cf01526b8.zip | |
[PATCH] Catch notification of memory add event of ACPI via container driver. (avoid redundant call add_memory)
When acpi_memory_device_init() is called at boottime to register struct
memory acpi_memory_device, acpi_bus_add() are called via
acpi_driver_attach().
But it also calls ops->start() function. It is called even if the memory
blocks are initialized at early boottime. In this case add_memory() return
-EEXIST, and the memory blocks becomes INVALID state even if it is normal.
This is patch to avoid calling add_memory() for already available memory.
[akpm@osdl.org: coding cleanups]
Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: "Brown, Len" <len.brown@intel.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/acpi/acpi_memhotplug.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c index 3721f8dd0de3..5652569b3762 100644 --- a/drivers/acpi/acpi_memhotplug.c +++ b/drivers/acpi/acpi_memhotplug.c @@ -234,6 +234,17 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) * (i.e. memory-hot-remove function) */ list_for_each_entry(info, &mem_device->res_list, list) { + u64 start_pfn, end_pfn; + + start_pfn = info->start_addr >> PAGE_SHIFT; + end_pfn = (info->start_addr + info->length - 1) >> PAGE_SHIFT; + + if (pfn_valid(start_pfn) || pfn_valid(end_pfn)) { + /* already enabled. try next area */ + num_enabled++; + continue; + } + result = add_memory(info->start_addr, info->length); if (result) continue; |