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error: Use error_prepend() where it makes obvious sense

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Done with this Coccinelle semantic patch

    @@
    expression FMT, E1, E2;
    expression list ARGS;
    @@
    -    error_setg(E1, FMT, ARGS, error_get_pretty(E2));
    +    error_propagate(E1, E2);/*###*/
    +    error_prepend(E1, FMT/*@@@*/, ARGS);

followed by manual cleanup, first because I can't figure out how to
make Coccinelle transform strings, and second to get rid of now
superfluous error_propagate().

We now use or propagate the original 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.  It also improves the message
printed with &error_abort when we screw up (see commit 1e9b65b).

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Markus Armbruster 2015-12-18 16:35:15 +01:00
parent c29b77f955
commit e43bfd9c87
6 changed files with 19 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

6
hw/usb/bus.c
View file

@ -329,9 +329,9 @@ static USBDevice *usb_try_create_simple(USBBus *bus, const char *name,
}
object_property_set_bool(OBJECT(dev), true, "realized", &err);
if (err) {
error_setg(errp, "Failed to initialize USB device '%s': %s",
name, error_get_pretty(err));
error_free(err);
error_propagate(errp, err);
error_prepend(errp, "Failed to initialize USB device '%s': ",
name);
object_unparent(OBJECT(dev));
return NULL;
}