Re: [PATCH] power: twl4030: fix a missing check of return value

[Sebastian Reichel]

Hi,

On Thu, Dec 20, 2018 at 01:51:24PM -0600, Kangjie Lu wrote:
> If twl4030_bci_read() fails, the read data in "s" is incorrect,
> which is however used in the following execution. The fix checks
> the return value of twl4030_bci_read() and returns an error code
> upstream upon the failure of twl4030_bci_read().
> 
> Signed-off-by: Kangjie Lu <k...@umn.edu>
> ---

Thanks, queued to power-supply-next.

-- Sebastian

>  drivers/power/supply/twl4030_charger.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/power/supply/twl4030_charger.c 
> b/drivers/power/supply/twl4030_charger.c
> index 0e202d4273fb..4299873a1118 100644
> --- a/drivers/power/supply/twl4030_charger.c
> +++ b/drivers/power/supply/twl4030_charger.c
> @@ -809,7 +809,9 @@ static int twl4030_bci_get_property(struct power_supply 
> *psy,
>               is_charging = state & TWL4030_MSTATEC_AC;
>       if (!is_charging) {
>               u8 s;
> -             twl4030_bci_read(TWL4030_BCIMDEN, &s);
> +             ret = twl4030_bci_read(TWL4030_BCIMDEN, &s);
> +             if (ret < 0)
> +                     return ret;
>               if (psy->desc->type == POWER_SUPPLY_TYPE_USB)
>                       is_charging = s & 1;
>               else
> -- 
> 2.17.1
> 

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