linux-kernel - Re: [PATCH] iio: sca3000: Remove an erroneous 'get

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Date:   Wed, 6 May 2020 13:38:22 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald <pmeerw@...erw.net>,
        "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-iio <linux-iio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] iio: sca3000: Remove an erroneous 'get_device()'

On Wed, May 6, 2020 at 6:55 AM Christophe JAILLET
<christophe.jaillet@...adoo.fr> wrote:
>
> This looks really unusual to have a 'get_device()' hidden in a 'dev_err()'
> call.
> Remove it.
>
> While at it add a missing \n at the end of the message.
>

It should have Fixes tag because it is a quite an issue (get_device()
breaks reference counting with all problems we may expect).

> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
> This patch is purely speculative.
> I've looked a bit arround and see no point for this get_device() but other
> eyes are welcomed :)
> ---
>  drivers/iio/accel/sca3000.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/iio/accel/sca3000.c b/drivers/iio/accel/sca3000.c
> index 66d768d971e1..6e429072e44a 100644
> --- a/drivers/iio/accel/sca3000.c
> +++ b/drivers/iio/accel/sca3000.c
> @@ -980,7 +980,7 @@ static int sca3000_read_data(struct sca3000_state *st,
>         st->tx[0] = SCA3000_READ_REG(reg_address_high);
>         ret = spi_sync_transfer(st->us, xfer, ARRAY_SIZE(xfer));
>         if (ret) {
> -               dev_err(get_device(&st->us->dev), "problem reading register");
> +               dev_err(&st->us->dev, "problem reading register\n");
>                 return ret;
>         }
>
> --
> 2.25.1
>


-- 
With Best Regards,
Andy Shevchenko