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authorZhao Yakui <yakui.zhao@intel.com>2009-07-07 10:56:11 +0800
committerLen Brown <len.brown@intel.com>2009-08-02 12:25:12 -0400
commit5d2619fca753d270e63e76c9e18437b0d9bc8d75 (patch)
tree61ba09656dd63c66659c8994f19767e262afb93f
parentaa7b2b2e973874df99a45b31adbed5978b46be1f (diff)
ACPI: Ingore the memory block with zero block size in course of memory hotplug
If the memory block size is zero, ignore it and don't do the memory hotplug flowchart. Otherwise it will complain the following warning message: >System RAM resource 0 - ffffffffffffffff cannot be added Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
-rw-r--r--drivers/acpi/acpi_memhotplug.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 37cbe72d17e..9a62224cc27 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -242,7 +242,12 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
num_enabled++;
continue;
}
-
+ /*
+ * If the memory block size is zero, please ignore it.
+ * Don't try to do the following memory hotplug flowchart.
+ */
+ if (!info->length)
+ continue;
if (node < 0)
node = memory_add_physaddr_to_nid(info->start_addr);
@@ -257,8 +262,15 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
mem_device->state = MEMORY_INVALID_STATE;
return -EINVAL;
}
-
- return result;
+ /*
+ * Sometimes the memory device will contain several memory blocks.
+ * When one memory block is hot-added to the system memory, it will
+ * be regarded as a success.
+ * Otherwise if the last memory block can't be hot-added to the system
+ * memory, it will be failure and the memory device can't be bound with
+ * driver.
+ */
+ return 0;
}
static int acpi_memory_powerdown_device(struct acpi_memory_device *mem_device)