error: Use error_reportf_err() where it makes obvious sense

Done with this Coccinelle semantic patch

    @@
    expression FMT, E, S;
    expression list ARGS;
    @@
    -    error_report(FMT, ARGS, error_get_pretty(E));
    +    error_reportf_err(E, FMT/*@@@*/, ARGS);
    (
    -    error_free(E);
    |
	 exit(S);
    |
	 abort();
    )

followed by a replace of '%s"/*@@@*/' by '"' and some line rewrapping,
because I can't figure out how to make Coccinelle transform strings.

We now use the error whole instead of just its message obtained with
error_get_pretty().  This avoids suppressing its hint (see commit
50b7b00), but I can't see how the errors touched in this commit could
come with hints.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1450452927-8346-12-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index ee6b43abc6..26ab67fc2a 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -725,9 +725,8 @@ USBDevice *usbdevice_create(const char *cmdline)
     }
     object_property_set_bool(OBJECT(dev), true, "realized", &err);
     if (err) {
-        error_report("Failed to initialize USB device '%s': %s",
-                     f->name, error_get_pretty(err));
-        error_free(err);
+        error_reportf_err(err, "Failed to initialize USB device '%s': ",
+                          f->name);
         object_unparent(OBJECT(dev));
         return NULL;
     }