msi: Guard msi/msix_write_config with msi_present

Terminate msi/msix_write_config early if support is not enabled. This
allows to remove checks at the caller site if MSI is optional.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/hw/msix.c b/hw/msix.c
index 59c7a8388f..339e652b81 100644
--- a/hw/msix.c
+++ b/hw/msix.c
@@ -187,7 +187,7 @@ void msix_write_config(PCIDevice *dev, uint32_t addr,
     int vector;
     bool was_masked;
 
-    if (!range_covers_byte(addr, len, enable_pos)) {
+    if (!msix_present(dev) || !range_covers_byte(addr, len, enable_pos)) {
         return;
     }