From 535770518f85e6e8b912c262492a251053491637 Mon Sep 17 00:00:00 2001
From: Markus Armbruster <armbru@redhat.com>
Date: Wed, 10 Jun 2020 07:32:18 +0200
Subject: [PATCH] usb: Eliminate usb_try_create_simple()
usb_try_create_simple() is qdev_try_new() and qdev_realize_and_unref()
with more verbose error messages. Of its two users, one ignores
errors, and the other asserts they are impossible.
Make them use qdev_try_new() and qdev_realize_and_unref() directly,
and eliminate usb_try_create_simple
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200610053247.1583243-30-armbru@redhat.com>
---
hw/usb/bus.c | 35 +++++++++++++----------------------
1 file changed, 13 insertions(+), 22 deletions(-)
diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index 5c4d31614e..a81aee2051 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -318,35 +318,22 @@ USBDevice *usb_new(const char *name)
return USB_DEVICE(qdev_new(name));
}
-bool usb_realize_and_unref(USBDevice *dev, USBBus *bus, Error **errp)
+static USBDevice *usb_try_new(const char *name)
{
- return qdev_realize_and_unref(&dev->qdev, &bus->qbus, errp);
+ return USB_DEVICE(qdev_try_new(name));
}
-static USBDevice *usb_try_create_simple(USBBus *bus, const char *name,
- Error **errp)
+bool usb_realize_and_unref(USBDevice *dev, USBBus *bus, Error **errp)
{
- Error *err = NULL;
- DeviceState *dev;
-
- dev = qdev_try_new(name);
- if (!dev) {
- error_setg(errp, "Failed to create USB device '%s'", name);
- return NULL;
- }
- qdev_realize_and_unref(dev, &bus->qbus, &err);
- if (err) {
- error_propagate_prepend(errp, err,
- "Failed to initialize USB device '%s': ",
- name);
- return NULL;
- }
- return USB_DEVICE(dev);
+ return qdev_realize_and_unref(&dev->qdev, &bus->qbus, errp);
}
USBDevice *usb_create_simple(USBBus *bus, const char *name)
{
- return usb_try_create_simple(bus, name, &error_abort);
+ USBDevice *dev = usb_new(name);
+
+ usb_realize_and_unref(dev, bus, &error_abort);
+ return dev;
}
static void usb_fill_port(USBPort *port, void *opaque, int index,
@@ -426,6 +413,7 @@ void usb_claim_port(USBDevice *dev, Error **errp)
{
USBBus *bus = usb_bus_from_device(dev);
USBPort *port;
+ USBDevice *hub;
assert(dev->port == NULL);
@@ -443,7 +431,10 @@ void usb_claim_port(USBDevice *dev, Error **errp)
} else {
if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {
/* Create a new hub and chain it on */
- usb_try_create_simple(bus, "usb-hub", NULL);
+ hub = usb_try_new("usb-hub");
+ if (hub) {
+ usb_realize_and_unref(hub, bus, NULL);
+ }
}
if (bus->nfree == 0) {
error_setg(errp, "tried to attach usb device %s to a bus "
--
2.30.2