hw/i386/acpi: Assert a pointer is not null BEFORE using it

Commit 72c194f7e75c added a non-null check on the 'obj' pointer.
Later, commit 500b11ea5095 added code which uses the 'obj'
pointer _before_ the assertion check. Move the assertion
_before_ the pointer use.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190427144025.22880-4-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 123ff2b8169a2796f4a2ae24290d5cddd0379f70..b4ec14e349f573ffedd206c763985a82842b818c 100644 (file)
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -186,6 +186,7 @@ static void acpi_get_pm_info(AcpiPmInfo *pm)
     pm->pcihp_io_base = 0;
     pm->pcihp_io_len = 0;
 
+    assert(obj);
     init_common_fadt_data(obj, &pm->fadt);
     if (piix) {
         /* w2k requires FADT(rev1) or it won't boot, keep PC compatible */
@@ -204,7 +205,6 @@ static void acpi_get_pm_info(AcpiPmInfo *pm)
         pm->fadt.flags |= 1 << ACPI_FADT_F_RESET_REG_SUP;
         pm->cpu_hp_io_base = ICH9_CPU_HOTPLUG_IO_BASE;
     }
-    assert(obj);
 
     /* The above need not be conditional on machine type because the reset port
      * happens to be the same on PIIX (pc) and ICH9 (q35). */