Re: [PATCH 1/2] md/raid0: Free r0conf memory when register integrity failed

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On Thu, Dec 9, 2021 at 5:19 PM Xiao Ni <xni@xxxxxxxxxx> wrote:
>
> On Fri, Dec 10, 2021 at 2:02 AM Song Liu <song@xxxxxxxxxx> wrote:
> >
> > On Wed, Dec 8, 2021 at 9:55 PM Xiao Ni <xni@xxxxxxxxxx> wrote:
> > >
> > > It doesn't free memory when register integrity failed. And move
> > > free conf codes into a single function.
> > >
> > > Signed-off-by: Xiao Ni <xni@xxxxxxxxxx>
> > > ---
> > >  drivers/md/raid0.c | 18 +++++++++++++++---
> > >  1 file changed, 15 insertions(+), 3 deletions(-)
> > >
> > > diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
> > > index 62c8b6adac70..3fa47df1c60e 100644
> > > --- a/drivers/md/raid0.c
> > > +++ b/drivers/md/raid0.c
> > > @@ -356,6 +356,7 @@ static sector_t raid0_size(struct mddev *mddev, sector_t sectors, int raid_disks
> > >         return array_sectors;
> > >  }
> > >
> > > +static void free_conf(struct r0conf *conf);
> > >  static void raid0_free(struct mddev *mddev, void *priv);
> > >
> > >  static int raid0_run(struct mddev *mddev)
> > > @@ -413,19 +414,30 @@ static int raid0_run(struct mddev *mddev)
> > >         dump_zones(mddev);
> > >
> > >         ret = md_integrity_register(mddev);
> > > +       if (ret)
> > > +               goto free;
> > >
> > >         return ret;
> > > +
> > > +free:
> > > +       free_conf(conf);
> >
> > Can we just use raid0_free() here? Also, after freeing conf,
>
> At first I used raid0_free too. But it looks strange after adding
> acct_bioset_exit
> in raid0_free. Because if creating stripe zones failed, it doesn't
> need to free conf,
> although it doesn't have problems that passes NULL to kfree.
>
I see. Let's add free_conf() then. Maybe we can move both free_conf()
and raid0_free() ahead to avoid the extra declaration?

Thanks,
Song



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