On 04/14/2016 05:48 PM, Stefan Wahren wrote:
> After successful touchscreen registration the input device was
> never freed. So fix this issue by using devm_input_allocate_device().
>
> Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
> ---
> drivers/iio/adc/mxs-lradc.c | 8 ++------
> 1 file changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/iio/adc/mxs-lradc.c b/drivers/iio/adc/mxs-lradc.c
> index 33051b8..0576953 100644
> --- a/drivers/iio/adc/mxs-lradc.c
> +++ b/drivers/iio/adc/mxs-lradc.c
> @@ -1109,12 +1109,11 @@ static int mxs_lradc_ts_register(struct mxs_lradc *lradc)
> {
> struct input_dev *input;
> struct device *dev = lradc->dev;
> - int ret;
>
> if (!lradc->use_touchscreen)
> return 0;
>
> - input = input_allocate_device();
> + input = devm_input_allocate_device(dev);
> if (!input)
> return -ENOMEM;
>
> @@ -1134,11 +1133,8 @@ static int mxs_lradc_ts_register(struct mxs_lradc *lradc)
>
> lradc->ts_input = input;
> input_set_drvdata(input, lradc);
> - ret = input_register_device(input);
> - if (ret)
> - input_free_device(lradc->ts_input);
>
> - return ret;
> + return input_register_device(input);
> }
>
> static void mxs_lradc_ts_unregister(struct mxs_lradc *lradc)
>
Nice find.
Looks like at91_adc.c and exynos_adc.c suffer from the exact same issue.
The leak looks a bit more severe on exynos even, exynos_adc_ts_init()
could use a proper fail path. Do you want to send patches or shall I ?
--
Best regards,
Marek Vasut
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