firmware: dmi: Add dmi_memdev_handle
Add a utility function dmi_memdev_handle() which returns the DMI
handle associated with a given memory slot. This will allow kernel
drivers to iterate over the memory slots.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index 6f28e51..2045566 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -1151,3 +1151,19 @@ u8 dmi_memdev_type(u16 handle)
return 0x0; /* Not a valid value */
}
EXPORT_SYMBOL_GPL(dmi_memdev_type);
+
+/**
+ * dmi_memdev_handle - get the DMI handle of a memory slot
+ * @slot: slot number
+ *
+ * Return the DMI handle associated with a given memory slot, or %0xFFFF
+ * if there is no such slot.
+ */
+u16 dmi_memdev_handle(int slot)
+{
+ if (dmi_memdev && slot >= 0 && slot < dmi_memdev_nr)
+ return dmi_memdev[slot].handle;
+
+ return 0xffff; /* Not a valid value */
+}
+EXPORT_SYMBOL_GPL(dmi_memdev_handle);