[PULL 6/7] ppc/pnv: avoid regenerating DTB if external DTB is present

[Harsh Prateek Bora <harshpb@linux.ibm.com>]

From: Shivang Upadhyay <shivangu@linux.ibm.com>

Currently externally provided dtb is overwritten in `pnv_reset`.
Fix this by only creating dtb if not provided from `-dtb`.

Reviewed-by: Aditya Gupta <adityag@linux.ibm.com>
Signed-off-by: Shivang Upadhyay <shivangu@linux.ibm.com>
Reviewed-by: Amit Machhiwal <amachhiw@linux.ibm.com>
Link: https://lore.kernel.org/qemu-devel/20260630103508.254000-2-shivangu@linux.ibm.com
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
---
 hw/ppc/pnv.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index 62812f22f8..afb6019b10 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -803,9 +803,13 @@ static void pnv_reset(MachineState *machine, ResetType type)
         mpipl_write_succeeded = do_mpipl_write(pnv);
     }
 
-    /* Regenerate device tree */
-    fdt = pnv_dt_create(machine);
-    _FDT((fdt_pack(fdt)));
+    /* Only create new dt if not provided in -dtb */
+    if (!machine->dtb) {
+        fdt = pnv_dt_create(machine);
+        _FDT((fdt_pack(fdt)));
+    } else {
+        fdt = machine->fdt;
+    }
 
     /*
      * If it's a MPIPL boot, add the "mpipl-boot" property, and reset the
-- 
2.52.0