Re: [PATCH 09/69] leds: lp5523: check return value of lp5xx_read and jump to cleanup code

Jacek Anaszewski
2021-05-03T19:36:19Z

On 5/3/21 1:56 PM, Greg Kroah-Hartman wrote:
> From: Phillip Potter <phil@philpotter.co.uk>
>
> Check return value of lp5xx_read and if non-zero, jump to code at end of
> the function, causing lp5523_stop_all_engines to be executed before
> returning the error value up the call chain. This fixes the original
> commit (248b57015f35) which was reverted due to the University of Minnesota
> problems.
>
> Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
> Cc: stable <stable@vger.kernel.org>
> Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
> drivers/leds/leds-lp5523.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
> index 5036d7d5f3d4..b1590cb4a188 100644
> --- a/drivers/leds/leds-lp5523.c
> +++ b/drivers/leds/leds-lp5523.c
> @@ -305,7 +305,9 @@ static int lp5523_init_program_engine(struct lp55xx_chip *chip)
>
> /* Let the programs run for couple of ms and check the engine status */
> usleep_range(3000, 6000);
> - lp55xx_read(chip, LP5523_REG_STATUS, &status);
> + ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
> + if (ret)
> + goto out;
> status &= LP5523_ENG_STATUS_MASK;
>
> if (status != LP5523_ENG_STATUS_MASK) {
>

Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>

Cc: Pavel Machek <pavel@ucw.cz>, linux-leds@vger.kernel.org

--
Best regards,
Jacek Anaszewski