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Merge branch 'memhotplug-crash' into release

hifive-unleashed-5.1
Len Brown 2009-08-02 12:27:26 -04:00
parent 6a61487791 5d2619fca7
commit a571a79a7e
1 changed files with 25 additions and 9 deletions
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34
drivers/acpi/acpi_memhotplug.c
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@ -38,6 +38,9 @@
#define _COMPONENT ACPI_MEMORY_DEVICE_COMPONENT
#undef PREFIX
#define PREFIX "ACPI:memory_hp:"
ACPI_MODULE_NAME("acpi_memhotplug");
MODULE_AUTHOR("Naveen B S <naveen.b.s@intel.com>");
MODULE_DESCRIPTION("Hotplug Mem Driver");
@ -153,6 +156,7 @@ acpi_memory_get_device(acpi_handle handle,
acpi_handle phandle;
struct acpi_device *device = NULL;
struct acpi_device *pdevice = NULL;
int result;
if (!acpi_bus_get_device(handle, &device) && device)
@ -165,9 +169,9 @@ acpi_memory_get_device(acpi_handle handle,
}
/* Get the parent device */
status = acpi_bus_get_device(phandle, &pdevice);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Cannot get acpi bus device"));
result = acpi_bus_get_device(phandle, &pdevice);
if (result) {
printk(KERN_WARNING PREFIX "Cannot get acpi bus device");
return -EINVAL;
}
@ -175,9 +179,9 @@ acpi_memory_get_device(acpi_handle handle,
* Now add the notified device. This creates the acpi_device
* and invokes .add function
*/
status = acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Cannot add acpi bus"));
result = acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE);
if (result) {
printk(KERN_WARNING PREFIX "Cannot add acpi bus");
return -EINVAL;
}
@ -238,7 +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);
@ -253,8 +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)