Re: [Qemu-devel] [PATCH 07/20 v2] target-i386: cpu_x86_register() consolidate freeing resources

[Igor Mammedov <imammedo@redhat.com>]

On Wed, 19 Dec 2012 14:36:28 -0200
Eduardo Habkost <ehabkost@redhat.com> wrote:

> On Tue, Dec 18, 2012 at 05:30:43PM +0100, Igor Mammedov wrote:
> > freeing resources in one place would require setting 'error'
> > to not NULL, so add some more error reporting before jumping to
> > exit branch.
> > 
> > Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> > ---
> >   v2:
> >    - add missing 'return -1' on exit if error is not NULL,
> >            Spotted-By: Eduardo Habkost <ehabkost@redhat.com>
> > ---
> >  target-i386/cpu.c |   17 ++++++++---------
> >  1 files changed, 8 insertions(+), 9 deletions(-)
> > 
> > diff --git a/target-i386/cpu.c b/target-i386/cpu.c
> > index 3b9bbfe..fe8b76c 100644
> > --- a/target-i386/cpu.c
> > +++ b/target-i386/cpu.c
> > @@ -1550,13 +1550,14 @@ int cpu_x86_register(X86CPU *cpu, const char
> > *cpu_model) 
> >      model_pieces = g_strsplit(cpu_model, ",", 2);
> >      if (!model_pieces[0]) {
> > -        goto error;
> > +        goto out;
> 
> Missing error_set*() call here.
Thinking about this error path, it looks like it's unreachable, because of
every caller of cpu_init() passes in not empty cpu_model.
Perhaps it would make sense to just assert(cpu_model) at the beginning of
function and delete this error check.

> 
> The rest of the patch looks good, to me. I liked this style of handling
> errors & freeing resources.
> 
> 
[snip]