On Mon, Jul 09, 2018 at 08:48:14AM +1000, NeilBrown wrote:
> On Thu, Jun 07 2018, Sergio Paracuellos wrote:
>
> > Function rt2880_pinctrl_dt_node_to_map was using 'kzalloc' to
> > reserve map memory. There is a 'pinctrl_utils_reserve_map' to
> > do this function. Just use it.
> >
> > Signed-off-by: Sergio Paracuellos <sergio.paracuel...@gmail.com>
> > ---
> > drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c | 12 +++++++++---
> > 1 file changed, 9 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
> > b/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
> > index a172b68..84494a1 100644
> > --- a/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
> > +++ b/drivers/staging/mt7621-pinctrl/pinctrl-rt2880.c
> > @@ -113,7 +113,10 @@ static int rt2880_pinctrl_dt_node_to_map(struct
> > pinctrl_dev *pctrldev,
> > struct pinctrl_map **map,
> > unsigned int *num_maps)
> > {
> > + struct rt2880_priv *p = pinctrl_dev_get_drvdata(pctrldev);
> > + int ret;
> > int max_maps = 0;
> > + unsigned int reserved_maps = 0;
> > struct pinctrl_map *tmp;
> > struct device_node *np;
> >
> > @@ -127,9 +130,12 @@ static int rt2880_pinctrl_dt_node_to_map(struct
> > pinctrl_dev *pctrldev,
> > if (!max_maps)
> > return max_maps;
> >
> > - *map = kzalloc(max_maps * sizeof(struct pinctrl_map), GFP_KERNEL);
> > - if (!*map)
> > - return -ENOMEM;
> > + ret = pinctrl_utils_reserve_map(pctrldev, map, &reserved_maps,
> > + num_maps, max_maps);
>
> Unfortunately this is buggy.
> pinctrl_utils_reserve_map() calls krealloc() on *map.
> So we need to initialise
> *map = NULL;
>
> before calling it.
Thanks for testing this. I'll send a patch with that initialization.
>
> Thanks,
> NeilBrown
Best regards,
Sergio Paracuellos
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