motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-06 09:13:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

error: Eliminate error_propagate() with Coccinelle, part 2

Browse source 
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 commit did that with a Coccinelle script I
consider fairly trustworthy.  This commit uses the same script with
the matching of return taken out, i.e. we convert

    if (!foo(..., &err)) {
        ...
        error_propagate(errp, err);
        ...
    }

to

    if (!foo(..., errp)) {
        ...
        ...
    }

This is unsound: @err could still be read between afterwards.  I don't
know how to express "no read of @err without an intervening write" in
Coccinelle.  Instead, I manually double-checked for uses of @err.

Suboptimal line breaks tweaked manually.  qdev_realize() simplified
further to placate scripts/checkpatch.pl.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200707160613.848843-36-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2020-07-07 18:06:03 +02:00
parent 668f62ec62
commit af175e85f9
23 changed files with 32 additions and 77 deletions
Download patch file Download diff file Expand all files Collapse all files

3
net/tap.c
View file

@ -836,9 +836,8 @@ int net_init_tap(const Netdev *netdev, const char *name,
}
for (i = 0; i < nfds; i++) {
fd = monitor_fd_param(cur_mon, fds[i], &err);
fd = monitor_fd_param(cur_mon, fds[i], errp);
if (fd == -1) {
error_propagate(errp, err);
ret = -1;
goto free_fail;
}