qom: Don't handle impossible object_property_get_link() failure

Don't handle object_property_get_link() failure that can't happen
unless the programmer screwed up, pass &error_abort.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200707160613.848843-25-armbru@redhat.com>

9 files changed, 12 insertions, 79 deletions

diff --git a/hw/arm/bcm2835_peripherals.c b/hw/arm/bcm2835_peripherals.c
index 2df81168e4..beade39e41 100644
--- a/hw/arm/bcm2835_peripherals.c
+++ b/hw/arm/bcm2835_peripherals.c
@@ -134,12 +134,7 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
     uint64_t ram_size, vcram_size;
     int n;
 
-    obj = object_property_get_link(OBJECT(dev), "ram", &err);
-    if (obj == NULL) {
-        error_setg(errp, "%s: required ram link not found: %s",
-                   __func__, error_get_pretty(err));
-        return;
-    }
+    obj = object_property_get_link(OBJECT(dev), "ram", &error_abort);
 
     ram = MEMORY_REGION(obj);
     ram_size = memory_region_size(ram);
diff --git a/hw/arm/bcm2836.c b/hw/arm/bcm2836.c
index 1a7560ef30..70ca2f0d9a 100644
--- a/hw/arm/bcm2836.c
+++ b/hw/arm/bcm2836.c
@@ -77,12 +77,7 @@ static void bcm2836_realize(DeviceState *dev, Error **errp)
 
     /* common peripherals from bcm2835 */
 
-    obj = object_property_get_link(OBJECT(dev), "ram", &err);
-    if (obj == NULL) {
-        error_setg(errp, "%s: required ram link not found: %s",
-                   __func__, error_get_pretty(err));
-        return;
-    }
+    obj = object_property_get_link(OBJECT(dev), "ram", &error_abort);
 
     object_property_add_const_link(OBJECT(&s->peripherals), "ram", obj);
 
diff --git a/hw/display/bcm2835_fb.c b/hw/display/bcm2835_fb.c
index 7c0e5eef2d..986c994522 100644
--- a/hw/display/bcm2835_fb.c
+++ b/hw/display/bcm2835_fb.c
@@ -405,7 +405,6 @@ static void bcm2835_fb_reset(DeviceState *dev)
 static void bcm2835_fb_realize(DeviceState *dev, Error **errp)
 {
     BCM2835FBState *s = BCM2835_FB(dev);
-    Error *err = NULL;
     Object *obj;
 
     if (s->vcram_base == 0) {
@@ -413,12 +412,7 @@ static void bcm2835_fb_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
-    if (obj == NULL) {
-        error_setg(errp, "%s: required dma-mr link not found: %s",
-                   __func__, error_get_pretty(err));
-        return;
-    }
+    obj = object_property_get_link(OBJECT(dev), "dma-mr", &error_abort);
 
     /* Fill in the parts of initial_config that are not set by QOM properties */
     s->initial_config.xres_virtual = s->initial_config.xres;
diff --git a/hw/dma/bcm2835_dma.c b/hw/dma/bcm2835_dma.c
index 4cd9dab745..eb0002a2b9 100644
--- a/hw/dma/bcm2835_dma.c
+++ b/hw/dma/bcm2835_dma.c
@@ -376,16 +376,9 @@ static void bcm2835_dma_reset(DeviceState *dev)
 static void bcm2835_dma_realize(DeviceState *dev, Error **errp)
 {
     BCM2835DMAState *s = BCM2835_DMA(dev);
-    Error *err = NULL;
     Object *obj;
 
-    obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
-    if (obj == NULL) {
-        error_setg(errp, "%s: required dma-mr link not found: %s",
-                   __func__, error_get_pretty(err));
-        return;
-    }
-
+    obj = object_property_get_link(OBJECT(dev), "dma-mr", &error_abort);
     s->dma_mr = MEMORY_REGION(obj);
     address_space_init(&s->dma_as, s->dma_mr, TYPE_BCM2835_DMA "-memory");
 
diff --git a/hw/gpio/bcm2835_gpio.c b/hw/gpio/bcm2835_gpio.c
index 91ce3d10cc..abdddbc67c 100644
--- a/hw/gpio/bcm2835_gpio.c
+++ b/hw/gpio/bcm2835_gpio.c
@@ -312,22 +312,11 @@ static void bcm2835_gpio_realize(DeviceState *dev, Error **errp)
 {
     BCM2835GpioState *s = BCM2835_GPIO(dev);
     Object *obj;
-    Error *err = NULL;
 
-    obj = object_property_get_link(OBJECT(dev), "sdbus-sdhci", &err);
-    if (obj == NULL) {
-        error_setg(errp, "%s: required sdhci link not found: %s",
-                __func__, error_get_pretty(err));
-        return;
-    }
+    obj = object_property_get_link(OBJECT(dev), "sdbus-sdhci", &error_abort);
     s->sdbus_sdhci = SD_BUS(obj);
 
-    obj = object_property_get_link(OBJECT(dev), "sdbus-sdhost", &err);
-    if (obj == NULL) {
-        error_setg(errp, "%s: required sdhost link not found: %s",
-                __func__, error_get_pretty(err));
-        return;
-    }
+    obj = object_property_get_link(OBJECT(dev), "sdbus-sdhost", &error_abort);
     s->sdbus_sdhost = SD_BUS(obj);
 }
 
diff --git a/hw/intc/nios2_iic.c b/hw/intc/nios2_iic.c
index 3a5d86c2a4..1a5df8c89a 100644
--- a/hw/intc/nios2_iic.c
+++ b/hw/intc/nios2_iic.c
@@ -66,14 +66,8 @@ static void altera_iic_init(Object *obj)
 static void altera_iic_realize(DeviceState *dev, Error **errp)
 {
     struct AlteraIIC *pv = ALTERA_IIC(dev);
-    Error *err = NULL;
-
-    pv->cpu = object_property_get_link(OBJECT(dev), "cpu", &err);
-    if (!pv->cpu) {
-        error_setg(errp, "altera,iic: CPU link not found: %s",
-                   error_get_pretty(err));
-        return;
-    }
+
+    pv->cpu = object_property_get_link(OBJECT(dev), "cpu", &error_abort);
 }
 
 static void altera_iic_class_init(ObjectClass *klass, void *data)
diff --git a/hw/misc/bcm2835_mbox.c b/hw/misc/bcm2835_mbox.c
index 2afa06a746..9f73cbd5e4 100644
--- a/hw/misc/bcm2835_mbox.c
+++ b/hw/misc/bcm2835_mbox.c
@@ -308,15 +308,8 @@ static void bcm2835_mbox_realize(DeviceState *dev, Error **errp)
 {
     BCM2835MboxState *s = BCM2835_MBOX(dev);
     Object *obj;
-    Error *err = NULL;
-
-    obj = object_property_get_link(OBJECT(dev), "mbox-mr", &err);
-    if (obj == NULL) {
-        error_setg(errp, "%s: required mbox-mr link not found: %s",
-                   __func__, error_get_pretty(err));
-        return;
-    }
 
+    obj = object_property_get_link(OBJECT(dev), "mbox-mr", &error_abort);
     s->mbox_mr = MEMORY_REGION(obj);
     address_space_init(&s->mbox_as, s->mbox_mr, TYPE_BCM2835_MBOX "-memory");
     bcm2835_mbox_reset(dev);
diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c
index 3e228ca0ae..73941bdae9 100644
--- a/hw/misc/bcm2835_property.c
+++ b/hw/misc/bcm2835_property.c
@@ -392,24 +392,11 @@ static void bcm2835_property_realize(DeviceState *dev, Error **errp)
 {
     BCM2835PropertyState *s = BCM2835_PROPERTY(dev);
     Object *obj;
-    Error *err = NULL;
-
-    obj = object_property_get_link(OBJECT(dev), "fb", &err);
-    if (obj == NULL) {
-        error_setg(errp, "%s: required fb link not found: %s",
-                   __func__, error_get_pretty(err));
-        return;
-    }
 
+    obj = object_property_get_link(OBJECT(dev), "fb", &error_abort);
     s->fbdev = BCM2835_FB(obj);
 
-    obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
-    if (obj == NULL) {
-        error_setg(errp, "%s: required dma-mr link not found: %s",
-                   __func__, error_get_pretty(err));
-        return;
-    }
-
+    obj = object_property_get_link(OBJECT(dev), "dma-mr", &error_abort);
     s->dma_mr = MEMORY_REGION(obj);
     address_space_init(&s->dma_as, s->dma_mr, TYPE_BCM2835_PROPERTY "-memory");
 
diff --git a/hw/usb/hcd-dwc2.c b/hw/usb/hcd-dwc2.c
index 72cbd051f3..56f91f6bee 100644
--- a/hw/usb/hcd-dwc2.c
+++ b/hw/usb/hcd-dwc2.c
@@ -1274,15 +1274,8 @@ static void dwc2_realize(DeviceState *dev, Error **errp)
     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     DWC2State *s = DWC2_USB(dev);
     Object *obj;
-    Error *err = NULL;
 
-    obj = object_property_get_link(OBJECT(dev), "dma-mr", &err);
-    if (err) {
-        error_setg(errp, "dwc2: required dma-mr link not found: %s",
-                   error_get_pretty(err));
-        return;
-    }
-    assert(obj != NULL);
+    obj = object_property_get_link(OBJECT(dev), "dma-mr", &error_abort);
 
     s->dma_mr = MEMORY_REGION(obj);
     address_space_init(&s->dma_as, s->dma_mr, "dwc2");