Hi,
On Mon, Aug 16, 2021 at 10:42:01AM +0200, Hans de Goede wrote:
> Hi,
>
> On 8/16/21 10:27 AM, Krzysztof Kozlowski wrote:
> > Reading status register can fail in the interrupt handler. In such
> > case, the regmap_read() will not store anything useful under passed
> > 'val' variable and random stack value will be used to determine type of
> > interrupt.
> >
> > Handle the regmap_read() failure to avoid handling interrupt type and
> > triggering changed power supply event based on random stack value.
> >
> > Fixes: 39e7213edc4f ("max17042_battery: Support regmap to access device's registers")
> > Cc: <stable@xxxxxxxxxxxxxxx>
> > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
>
> Thanks, the entire series looks good to me:
>
> Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
>
> For the series.
Thanks, series queued.
-- Sebastian
>
> Regards,
>
> Hans
>
> > ---
> > drivers/power/supply/max17042_battery.c | 6 +++++-
> > 1 file changed, 5 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c
> > index ce2041b30a06..858ae97600d4 100644
> > --- a/drivers/power/supply/max17042_battery.c
> > +++ b/drivers/power/supply/max17042_battery.c
> > @@ -869,8 +869,12 @@ static irqreturn_t max17042_thread_handler(int id, void *dev)
> > {
> > struct max17042_chip *chip = dev;
> > u32 val;
> > + int ret;
> > +
> > + ret = regmap_read(chip->regmap, MAX17042_STATUS, &val);
> > + if (ret)
> > + return IRQ_HANDLED;
> >
> > - regmap_read(chip->regmap, MAX17042_STATUS, &val);
> > if ((val & STATUS_INTR_SOCMIN_BIT) ||
> > (val & STATUS_INTR_SOCMAX_BIT)) {
> > dev_info(&chip->client->dev, "SOC threshold INTR\n");
> >
>
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