error: Eliminate error_propagate() manually

When all we do with an Error we receive into a local variable is
propagating to somewhere else, we can just as well receive it there
right away.  The previous two commits did that for sufficiently simple
cases with Coccinelle.  Do it for several more manually.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200707160613.848843-37-armbru@redhat.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index ba27afe..b17bda3 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -723,15 +723,13 @@ static bool usb_get_attached(Object *obj, Error **errp)
 static void usb_set_attached(Object *obj, bool value, Error **errp)
 {
     USBDevice *dev = USB_DEVICE(obj);
-    Error *err = NULL;
 
     if (dev->attached == value) {
         return;
     }
 
     if (value) {
-        usb_device_attach(dev, &err);
-        error_propagate(errp, err);
+        usb_device_attach(dev, errp);
     } else {
         usb_device_detach(dev);
     }