On Sun, Jan 06, 2019 at 12:17:27PM -0600, Aditya Pakki wrote:
> regmap_bulk_read() can return a non zero value on failure. The fix
> checks if the function call succeeded before calling mod_timer. The
> issue was identified by a static analysis tool.
>
> Signed-off-by: Aditya Pakki <pakki...@umn.edu>
Applied, thank you.
> ---
> drivers/input/touchscreen/ad7879.c | 11 +++++++----
> 1 file changed, 7 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/input/touchscreen/ad7879.c
> b/drivers/input/touchscreen/ad7879.c
> index 6fa714c587b4..8c908572c1f2 100644
> --- a/drivers/input/touchscreen/ad7879.c
> +++ b/drivers/input/touchscreen/ad7879.c
> @@ -246,11 +246,14 @@ static void ad7879_timer(struct timer_list *t)
> static irqreturn_t ad7879_irq(int irq, void *handle)
> {
> struct ad7879 *ts = handle;
> + int error;
>
> - regmap_bulk_read(ts->regmap, AD7879_REG_XPLUS,
> - ts->conversion_data, AD7879_NR_SENSE);
> -
> - if (!ad7879_report(ts))
> + error = regmap_bulk_read(ts->regmap, AD7879_REG_XPLUS,
> + ts->conversion_data, AD7879_NR_SENSE);
> + if (error)
> + dev_err_ratelimited(ts->dev, "failed to read %#02x: %d\n",
> + AD7879_REG_XPLUS, error);
> + else if (!ad7879_report(ts))
> mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT);
>
> return IRQ_HANDLED;
> --
> 2.17.1
>
--
Dmitry
