[Qemu-devel] [PATCH v4 3/6] hw/arm/boot: do not free VirtBoardInfo fdt in arm_load_dtb

[Eric Auger <eric.auger@linaro.org>]

Currently arm_load_dtb frees the fdt handle whatever it is allocated
from load_device_tree or allocated externally.

When adding dynamic sysbus nodes after the first dtb load, we would like
to reuse the fdt used during the first load instead of re-creating the
whole device tree. If the fdt is destroyed, this is not possible.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
---
 hw/arm/boot.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index 9f0662e..0e4b078 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -427,12 +427,16 @@ int arm_load_dtb(const struct arm_boot_info *binfo)
      */
     rom_add_blob_fixed("dtb", fdt, size, binfo->dtb_start);
 
-    g_free(fdt);
+    if (binfo->dtb_filename) {
+        g_free(fdt);
+    }
 
     return size;
 
 fail:
-    g_free(fdt);
+    if (binfo->dtb_filename) {
+        g_free(fdt);
+    }
     return -1;
 }
 
-- 
1.8.3.2