sun4uv: fix serial initialization regression

Since commit b6607a1a204d, serial_hds_isa_init() was introduced to
factor out serial_isa_init() loops. However, sun4uv shouldn't start from
0 when there is a mm serial on 0 already. Add a "from" argument to
serial_hds_isa_init().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20161022095318.17775-5-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/alpha/dp264.c

@@ -88,7 +88,7 @@ static void clipper_init(MachineState *machine)
     pci_vga_init(pci_bus);
 
     /* Serial code setup.  */
-    serial_hds_isa_init(isa_bus, MAX_SERIAL_PORTS);
+    serial_hds_isa_init(isa_bus, 0, MAX_SERIAL_PORTS);
 
     /* Network setup.  e1000 is good enough, failing Tulip support.  */
     for (i = 0; i < nb_nics; i++) {

hw/char/serial-isa.c

@@ -133,13 +133,14 @@ static void serial_isa_init(ISABus *bus, int index, CharDriverState *chr)
     qdev_init_nofail(dev);
 }
 
-void serial_hds_isa_init(ISABus *bus, int n)
+void serial_hds_isa_init(ISABus *bus, int from, int to)
 {
     int i;
 
-    assert(n <= MAX_SERIAL_PORTS);
+    assert(from >= 0);
+    assert(to <= MAX_SERIAL_PORTS);
 
-    for (i = 0; i < n; ++i) {
+    for (i = from; i < to; ++i) {
         if (serial_hds[i]) {
             serial_isa_init(bus, i, serial_hds[i]);
         }

hw/i386/pc.c

@@ -1589,7 +1589,7 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
         pcspk_init(isa_bus, pit);
     }
 
-    serial_hds_isa_init(isa_bus, MAX_SERIAL_PORTS);
+    serial_hds_isa_init(isa_bus, 0, MAX_SERIAL_PORTS);
     parallel_hds_isa_init(isa_bus, MAX_PARALLEL_PORTS);
 
     a20_line = qemu_allocate_irqs(handle_a20_line_change, first_cpu, 2);

hw/mips/mips_fulong2e.c

@@ -374,7 +374,7 @@ static void mips_fulong2e_init(MachineState *machine)
 
     rtc_init(isa_bus, 2000, NULL);
 
-    serial_hds_isa_init(isa_bus, MAX_SERIAL_PORTS);
+    serial_hds_isa_init(isa_bus, 0, MAX_SERIAL_PORTS);
     parallel_hds_isa_init(isa_bus, 1);
 
     /* Sound card */

hw/mips/mips_malta.c

@@ -1215,7 +1215,7 @@ void mips_malta_init(MachineState *machine)
     isa_create_simple(isa_bus, "i8042");
 
     rtc_init(isa_bus, 2000, NULL);
-    serial_hds_isa_init(isa_bus, 2);
+    serial_hds_isa_init(isa_bus, 0, 2);
     parallel_hds_isa_init(isa_bus, 1);
 
     for(i = 0; i < MAX_FD; i++) {

hw/mips/mips_r4k.c

@@ -286,7 +286,7 @@ void mips_r4k_init(MachineState *machine)
 
     pit = pit_init(isa_bus, 0x40, 0, NULL);
 
-    serial_hds_isa_init(isa_bus, MAX_SERIAL_PORTS);
+    serial_hds_isa_init(isa_bus, 0, MAX_SERIAL_PORTS);
 
     isa_vga_init(isa_bus);
 

hw/sparc64/sun4u.c

@@ -824,7 +824,7 @@ static void sun4uv_init(MemoryRegion *address_space_mem,
         i++;
     }
 
-    serial_hds_isa_init(isa_bus, MAX_SERIAL_PORTS);
+    serial_hds_isa_init(isa_bus, i, MAX_SERIAL_PORTS);
     parallel_hds_isa_init(isa_bus, MAX_PARALLEL_PORTS);
 
     for(i = 0; i < nb_nics; i++)

include/hw/char/serial.h

@@ -94,6 +94,6 @@ SerialState *serial_mm_init(MemoryRegion *address_space,
 
 /* serial-isa.c */
 #define TYPE_ISA_SERIAL "isa-serial"
-void serial_hds_isa_init(ISABus *bus, int n);
+void serial_hds_isa_init(ISABus *bus, int from, int to);
 
 #endif