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,
NeilBrown
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