fw_cfg_mem: max access size and region size are the same for data register

Make it clear that the maximum access size to the MMIO data register
determines the full size of the memory region.

Currently the max access size is 1.

This patch doesn't change behavior.

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1419250305-31062-4-git-send-email-pbonzini@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index c48bc6e..8deb860 100644 (file)
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -31,7 +31,6 @@
 #include "qemu/config-file.h"
 
 #define FW_CFG_SIZE 2
-#define FW_CFG_DATA_SIZE 1
 #define FW_CFG_NAME "fw_cfg"
 #define FW_CFG_PATH "/machine/" FW_CFG_NAME
 
@@ -694,7 +693,8 @@ static void fw_cfg_mem_realize(DeviceState *dev, Error **errp)
     sysbus_init_mmio(sbd, &s->ctl_iomem);
 
     memory_region_init_io(&s->data_iomem, OBJECT(s), &fw_cfg_data_mem_ops,
-                          FW_CFG(s), "fwcfg.data", FW_CFG_DATA_SIZE);
+                          FW_CFG(s), "fwcfg.data",
+                          fw_cfg_data_mem_ops.valid.max_access_size);
     sysbus_init_mmio(sbd, &s->data_iomem);
 }