qdev: Use returned bool to check for qdev_realize() etc. failure

Convert

    foo(..., &err);
    if (err) {
        ...
    }

to

    if (!foo(..., &err)) {
        ...
    }

for qdev_realize(), qdev_realize_and_unref(), qbus_realize() and their
wrappers isa_realize_and_unref(), pci_realize_and_unref(),
sysbus_realize(), sysbus_realize_and_unref(), usb_realize_and_unref().
Coccinelle script:

    @@
    identifier fun = {
        isa_realize_and_unref, pci_realize_and_unref, qbus_realize,
        qdev_realize, qdev_realize_and_unref, sysbus_realize,
        sysbus_realize_and_unref, usb_realize_and_unref
    };
    expression list args, args2;
    typedef Error;
    Error *err;
    @@
    -    fun(args, &err, args2);
    -    if (err)
    +    if (!fun(args, &err, args2))
         {
             ...
         }

Chokes on hw/arm/musicpal.c's lcd_refresh() with the unhelpful error
message "no position information".  Nothing to convert there; skipped.

Fails to convert hw/arm/armsse.c, because Coccinelle gets confused by
ARMSSE being used both as typedef and function-like macro there.
Converted manually.

A few line breaks tidied up manually.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Message-Id: <20200707160613.848843-5-armbru@redhat.com>

1 files changed, 8 insertions, 16 deletions

diff --git a/hw/arm/stm32f405_soc.c b/hw/arm/stm32f405_soc.c
index cf9228d8e7..f1f0dc40b1 100644
--- a/hw/arm/stm32f405_soc.c
+++ b/hw/arm/stm32f405_soc.c
@@ -118,16 +118,14 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     qdev_prop_set_bit(armv7m, "enable-bitband", true);
     object_property_set_link(OBJECT(&s->armv7m), OBJECT(system_memory),
                                      "memory", &error_abort);
-    sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), &err);
-    if (err != NULL) {
+    if (!sysbus_realize(SYS_BUS_DEVICE(&s->armv7m), &err)) {
         error_propagate(errp, err);
         return;
     }
 
     /* System configuration controller */
     dev = DEVICE(&s->syscfg);
-    sysbus_realize(SYS_BUS_DEVICE(&s->syscfg), &err);
-    if (err != NULL) {
+    if (!sysbus_realize(SYS_BUS_DEVICE(&s->syscfg), &err)) {
         error_propagate(errp, err);
         return;
     }
@@ -139,8 +137,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     for (i = 0; i < STM_NUM_USARTS; i++) {
         dev = DEVICE(&(s->usart[i]));
         qdev_prop_set_chr(dev, "chardev", serial_hd(i));
-        sysbus_realize(SYS_BUS_DEVICE(&s->usart[i]), &err);
-        if (err != NULL) {
+        if (!sysbus_realize(SYS_BUS_DEVICE(&s->usart[i]), &err)) {
             error_propagate(errp, err);
             return;
         }
@@ -153,8 +150,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     for (i = 0; i < STM_NUM_TIMERS; i++) {
         dev = DEVICE(&(s->timer[i]));
         qdev_prop_set_uint64(dev, "clock-frequency", 1000000000);
-        sysbus_realize(SYS_BUS_DEVICE(&s->timer[i]), &err);
-        if (err != NULL) {
+        if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer[i]), &err)) {
             error_propagate(errp, err);
             return;
         }
@@ -173,8 +169,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     }
     object_property_set_int(OBJECT(&s->adc_irqs), STM_NUM_ADCS,
                             "num-lines", &error_abort);
-    qdev_realize(DEVICE(&s->adc_irqs), NULL, &err);
-    if (err != NULL) {
+    if (!qdev_realize(DEVICE(&s->adc_irqs), NULL, &err)) {
         error_propagate(errp, err);
         return;
     }
@@ -183,8 +178,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
 
     for (i = 0; i < STM_NUM_ADCS; i++) {
         dev = DEVICE(&(s->adc[i]));
-        sysbus_realize(SYS_BUS_DEVICE(&s->adc[i]), &err);
-        if (err != NULL) {
+        if (!sysbus_realize(SYS_BUS_DEVICE(&s->adc[i]), &err)) {
             error_propagate(errp, err);
             return;
         }
@@ -197,8 +191,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
     /* SPI devices */
     for (i = 0; i < STM_NUM_SPIS; i++) {
         dev = DEVICE(&(s->spi[i]));
-        sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), &err);
-        if (err != NULL) {
+        if (!sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), &err)) {
             error_propagate(errp, err);
             return;
         }
@@ -209,8 +202,7 @@ static void stm32f405_soc_realize(DeviceState *dev_soc, Error **errp)
 
     /* EXTI device */
     dev = DEVICE(&s->exti);
-    sysbus_realize(SYS_BUS_DEVICE(&s->exti), &err);
-    if (err != NULL) {
+    if (!sysbus_realize(SYS_BUS_DEVICE(&s->exti), &err)) {
         error_propagate(errp, err);
         return;
     }