hw/display: Allow vga_common_init() to return errors

The vga_common_init() function currently cannot report errors to its
caller. But in the following patch, we'd need this possibility, so
let's change it to take an "Error **" as parameter for this.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220317083027.16688-3-thuth@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

hw/display/ati.c

@@ -955,7 +955,9 @@ static void ati_vga_realize(PCIDevice *dev, Error **errp)
     }
 
     /* init vga bits */
-    vga_common_init(vga, OBJECT(s));
+    if (!vga_common_init(vga, OBJECT(s), errp)) {
+        return;
+    }
     vga_init(vga, OBJECT(s), pci_address_space(dev),
              pci_address_space_io(dev), true);
     vga->con = graphic_console_init(DEVICE(s), 0, s->vga.hw_ops, &s->vga);

hw/display/cirrus_vga.c

@@ -2956,7 +2956,9 @@ static void pci_cirrus_vga_realize(PCIDevice *dev, Error **errp)
         return;
     }
     /* setup VGA */
-    vga_common_init(&s->vga, OBJECT(dev));
+    if (!vga_common_init(&s->vga, OBJECT(dev), errp)) {
+        return;
+    }
     cirrus_init_common(s, OBJECT(dev), device_id, 1, pci_address_space(dev),
                        pci_address_space_io(dev));
     s->vga.con = graphic_console_init(DEVICE(dev), 0, s->vga.hw_ops, &s->vga);

hw/display/cirrus_vga_isa.c

@@ -56,7 +56,9 @@ static void isa_cirrus_vga_realizefn(DeviceState *dev, Error **errp)
         return;
     }
     s->global_vmstate = true;
-    vga_common_init(s, OBJECT(dev));
+    if (!vga_common_init(s, OBJECT(dev), errp)) {
+        return;
+    }
     cirrus_init_common(&d->cirrus_vga, OBJECT(dev), CIRRUS_ID_CLGD5430, 0,
                        isa_address_space(isadev),
                        isa_address_space_io(isadev));

hw/display/qxl.c

@@ -2215,7 +2215,11 @@ static void qxl_realize_primary(PCIDevice *dev, Error **errp)
     qxl_init_ramsize(qxl);
     vga->vbe_size = qxl->vgamem_size;
     vga->vram_size_mb = qxl->vga.vram_size / MiB;
-    vga_common_init(vga, OBJECT(dev));
+    vga_common_init(vga, OBJECT(dev), &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
     vga_init(vga, OBJECT(dev),
              pci_address_space(dev), pci_address_space_io(dev), false);
     portio_list_init(&qxl->vga_port_list, OBJECT(dev), qxl_vga_portio_list,

hw/display/vga-isa.c

@@ -62,7 +62,10 @@ static void vga_isa_realizefn(DeviceState *dev, Error **errp)
     const MemoryRegionPortio *vga_ports, *vbe_ports;
 
     s->global_vmstate = true;
-    vga_common_init(s, OBJECT(dev));
+    if (!vga_common_init(s, OBJECT(dev), errp)) {
+        return;
+    }
+
     s->legacy_address_space = isa_address_space(isadev);
     vga_io_memory = vga_init_io(s, OBJECT(dev), &vga_ports, &vbe_ports);
     isa_register_portio_list(isadev, &d->portio_vga,

hw/display/vga-mmio.c

@@ -102,7 +102,10 @@ static void vga_mmio_realizefn(DeviceState *dev, Error **errp)
 
     s->vga.bank_offset = 0;
     s->vga.global_vmstate = true;
-    vga_common_init(&s->vga, OBJECT(dev));
+    if (!vga_common_init(&s->vga, OBJECT(dev), errp)) {
+        return;
+    }
+
     sysbus_init_mmio(sbd, &s->vga.vram);
     s->vga.con = graphic_console_init(dev, 0, s->vga.hw_ops, &s->vga);
 }

hw/display/vga-pci.c

@@ -239,7 +239,9 @@ static void pci_std_vga_realize(PCIDevice *dev, Error **errp)
     bool edid = false;
 
     /* vga + console init */
-    vga_common_init(s, OBJECT(dev));
+    if (!vga_common_init(s, OBJECT(dev), errp)) {
+        return;
+    }
     vga_init(s, OBJECT(dev), pci_address_space(dev), pci_address_space_io(dev),
              true);
 
@@ -275,7 +277,9 @@ static void pci_secondary_vga_realize(PCIDevice *dev, Error **errp)
     bool edid = false;
 
     /* vga + console init */
-    vga_common_init(s, OBJECT(dev));
+    if (!vga_common_init(s, OBJECT(dev), errp)) {
+        return;
+    }
     s->con = graphic_console_init(DEVICE(dev), 0, s->hw_ops, s);
 
     /* mmio bar */

hw/display/vga.c

@@ -2168,9 +2168,10 @@ static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
     return val;
 }
 
-void vga_common_init(VGACommonState *s, Object *obj)
+bool vga_common_init(VGACommonState *s, Object *obj, Error **errp)
 {
     int i, j, v, b;
+    Error *local_err = NULL;
 
     for(i = 0;i < 256; i++) {
         v = 0;
@@ -2206,7 +2207,11 @@ void vga_common_init(VGACommonState *s, Object *obj)
 
     s->is_vbe_vmstate = 1;
     memory_region_init_ram_nomigrate(&s->vram, obj, "vga.vram", s->vram_size,
-                           &error_fatal);
+                                     &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return false;
+    }
     vmstate_register_ram(&s->vram, s->global_vmstate ? NULL : DEVICE(obj));
     xen_register_framebuffer(&s->vram);
     s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
@@ -2237,6 +2242,8 @@ void vga_common_init(VGACommonState *s, Object *obj)
     s->default_endian_fb = false;
 #endif
     vga_dirty_log_start(s);
+
+    return true;
 }
 
 static const MemoryRegionPortio vga_portio_list[] = {

hw/display/vga_int.h

@@ -156,7 +156,7 @@ static inline int c6_to_8(int v)
     return (v << 2) | (b << 1) | b;
 }
 
-void vga_common_init(VGACommonState *s, Object *obj);
+bool vga_common_init(VGACommonState *s, Object *obj, Error **errp);
 void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space,
               MemoryRegion *address_space_io, bool init_vga_ports);
 MemoryRegion *vga_init_io(VGACommonState *s, Object *obj,

hw/display/virtio-vga.c

@@ -108,7 +108,9 @@ static void virtio_vga_base_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
 
     /* init vga compat bits */
     vga->vram_size_mb = 8;
-    vga_common_init(vga, OBJECT(vpci_dev));
+    if (!vga_common_init(vga, OBJECT(vpci_dev), errp)) {
+        return;
+    }
     vga_init(vga, OBJECT(vpci_dev), pci_address_space(&vpci_dev->pci_dev),
              pci_address_space_io(&vpci_dev->pci_dev), true);
     pci_register_bar(&vpci_dev->pci_dev, 0,

hw/display/vmware_vga.c

@@ -1254,7 +1254,7 @@ static void vmsvga_init(DeviceState *dev, struct vmsvga_state_s *s,
                            &error_fatal);
     s->fifo_ptr = memory_region_get_ram_ptr(&s->fifo_ram);
 
-    vga_common_init(&s->vga, OBJECT(dev));
+    vga_common_init(&s->vga, OBJECT(dev), &error_fatal);
     vga_init(&s->vga, OBJECT(dev), address_space, io, true);
     vmstate_register(NULL, 0, &vmstate_vga_common, &s->vga);
     s->new_depth = 32;