Hi Pramod,
On Fri, Jul 25, 2014 at 05:04:34PM +0530, pramod.gurav.etc@xxxxxxxxx wrote:
> From: Pramod Gurav <pramod.gurav@xxxxxxxxxxxxxxx>
>
> This patch does below:
> - Removes kfree done on data allocated with devm_zalloc in probe
> path of the driver.
> - Adds a check on return value from devm_kzalloc which was missing
>
> CC: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
> CC: Lejun Zhu <lejun.zhu@xxxxxxxxxxxxxxx>
> CC: Sachin Kamat <sachin.kamat@xxxxxxxxxx>
>
> Signed-off-by: Pramod Gurav <pramod.gurav@xxxxxxxxxxxxxxx>
> ---
> drivers/input/misc/soc_button_array.c | 17 +++++++----------
> 1 file changed, 7 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/input/misc/soc_button_array.c b/drivers/input/misc/soc_button_array.c
> index 5a6334b..fc64ec6 100644
> --- a/drivers/input/misc/soc_button_array.c
> +++ b/drivers/input/misc/soc_button_array.c
> @@ -83,6 +83,9 @@ soc_button_device_create(struct pnp_dev *pdev,
> sizeof(*gpio_keys_pdata) +
> sizeof(*gpio_keys) * MAX_NBUTTONS,
> GFP_KERNEL);
> + if (!gpio_keys_pdata)
> + return ERR_PTR(-ENOMEM);
OK, that makes sense.
> +
> gpio_keys = (void *)(gpio_keys_pdata + 1);
>
> for (info = button_info; info->name; info++) {
> @@ -102,20 +105,16 @@ soc_button_device_create(struct pnp_dev *pdev,
> n_buttons++;
> }
>
> - if (n_buttons == 0) {
> - error = -ENODEV;
> - goto err_free_mem;
> - }
> + if (n_buttons == 0)
> + return ERR_PTR(-ENODEV);
But that one and the rest don't, because failure in
soc_button_device_create() does not necessarily mean that binding for
the whole device will fail. In this case we do not want unused memory
hang around.
Thanks.
--
Dmitry
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