Re: [PATCH v3 1/7] nvmem: fix memory leak in error path

[Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>]

śr., 19 lut 2020 o 11:52 Srinivas Kandagatla
<srinivas.kandagatla@xxxxxxxxxx> napisał(a):
>
>
>
> On 19/02/2020 09:22, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski<bgolaszewski@xxxxxxxxxxxx>
> >
> > We need to free the ida mapping and nvmem struct if the write-protect
> > GPIO lookup fails.
> >
> > Fixes: 2a127da461a9 ("nvmem: add support for the write-protect pin")
> > Signed-off-by: Bartosz Golaszewski<bgolaszewski@xxxxxxxxxxxx>
> > ---
> >   drivers/nvmem/core.c | 7 +++++--
> >   1 file changed, 5 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
> > index ef326f243f36..89974e40d250 100644
> > --- a/drivers/nvmem/core.c
> > +++ b/drivers/nvmem/core.c
> > @@ -352,8 +352,11 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
> >       else
> >               nvmem->wp_gpio = gpiod_get_optional(config->dev, "wp",
> >                                                   GPIOD_OUT_HIGH);
> > -     if (IS_ERR(nvmem->wp_gpio))
> > -             return ERR_CAST(nvmem->wp_gpio);
> > +     if (IS_ERR(nvmem->wp_gpio)) {
> > +             ida_simple_remove(&nvmem_ida, nvmem->id);
> > +             kfree(nvmem);
> > +             return ERR_PTR(rval);
>
> Why are you returning rval here?
> This points return value of ida_simple_get and not the actual error code
> from wp_gpio.
>

Duh! Thanks for catching this.

Bart