hw/mips/jazz: Simplify the NIC setup code

The for-loop does not make much sense here - it is always left after
the first iteration, so we can also check for nb_nics == 1 instead
which is way easier to understand.

Also, the checks for nd->model are superfluous since the code in
mips_jazz_init_net() calls qemu_check_nic_model() that already
takes care of this (i.e. initializing nd->model if it has not been
set yet, and checking whether it is the "help" option or the
supported NIC model).

Message-ID: <20230913160922.355640-3-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/mips/jazz.c

@@ -172,7 +172,6 @@ static void mips_jazz_init(MachineState *machine,
     MemoryRegion *rtc = g_new(MemoryRegion, 1);
     MemoryRegion *dma_dummy = g_new(MemoryRegion, 1);
     MemoryRegion *dp8393x_prom = g_new(MemoryRegion, 1);
-    NICInfo *nd;
     DeviceState *dev, *rc4030;
     MMIOKBDState *i8042;
     SysBusDevice *sysbus;
@@ -315,21 +314,11 @@ static void mips_jazz_init(MachineState *machine,
     }
 
     /* Network controller */
-    for (n = 0; n < nb_nics; n++) {
-        nd = &nd_table[n];
-        if (!nd->model) {
-            nd->model = g_strdup("dp83932");
-        }
-        if (strcmp(nd->model, "dp83932") == 0) {
-            mips_jazz_init_net(nd, rc4030_dma_mr, rc4030, dp8393x_prom);
-            break;
-        } else if (is_help_option(nd->model)) {
-            error_report("Supported NICs: dp83932");
-            exit(1);
-        } else {
-            error_report("Unsupported NIC: %s", nd->model);
-            exit(1);
-        }
+    if (nb_nics == 1) {
+        mips_jazz_init_net(&nd_table[0], rc4030_dma_mr, rc4030, dp8393x_prom);
+    } else if (nb_nics > 1) {
+        error_report("This machine only supports one NIC");
+        exit(1);
     }
 
     /* SCSI adapter */