Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Thu, 15 Apr 2021 20:44:31 +0530
From:   Syed Nayyar Waris <syednwaris@gmail.com>
To:     William Breathitt Gray <vilhelm.gray@gmail.com>
Cc:     jic23@kernel.org, kernel@pengutronix.de,
        linux-stm32@st-md-mailman.stormreply.com, a.fatoum@pengutronix.de,
        kamel.bouhara@bootlin.com, gwendal@chromium.org,
        alexandre.belloni@bootlin.com, david@lechnology.com,
        linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        patrick.havelange@essensium.com, fabrice.gasnier@st.com,
        mcoquelin.stm32@gmail.com, alexandre.torgue@st.com,
        o.rempel@pengutronix.de
Subject: Re: [PATCH v10 04/33] counter: 104-quad-8: Return error when invalid
 mode during ceiling_write
Message-ID: <20210415151431.GB8933@syed>
References: <cover.1616150619.git.vilhelm.gray@gmail.com>
 <98676f9a2e9cf991d7a002b3b264cca774e5b3c8.1616150619.git.vilhelm.gray@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <98676f9a2e9cf991d7a002b3b264cca774e5b3c8.1616150619.git.vilhelm.gray@gmail.com>
User-Agent: Mutt/1.5.24 (2015-08-30)
Precedence: bulk

On Fri, Mar 19, 2021 at 08:00:23PM +0900, William Breathitt Gray wrote:
> The 104-QUAD-8 only has two count modes where a ceiling value makes
> sense: Range Limit and Modulo-N. Outside of these two modes, setting a
> ceiling value is an invalid operation -- so let's report it as such by
> returning -EINVAL.
> 
> Fixes: fc069262261c ("counter: 104-quad-8: Add lock guards - generic interface")
> Cc: Syed Nayyar Waris <syednwaris@gmail.com>
> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
> ---
>  drivers/counter/104-quad-8.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c
> index 4bb9abffae48..233a3acc1377 100644
> --- a/drivers/counter/104-quad-8.c
> +++ b/drivers/counter/104-quad-8.c
> @@ -714,13 +714,14 @@ static ssize_t quad8_count_ceiling_write(struct counter_device *counter,
>  	switch (priv->count_mode[count->id]) {
>  	case 1:
>  	case 3:
> +		mutex_unlock(&priv->lock);
>  		quad8_preset_register_set(priv, count->id, ceiling);
> -		break;
> +		return len;
>  	}
>  
>  	mutex_unlock(&priv->lock);
>  
> -	return len;
> +	return -EINVAL;
>  }
>  
>  static ssize_t quad8_count_preset_enable_read(struct counter_device *counter,
> -- 
> 2.30.2
>

Acked-by: Syed Nayyar Waris <syednwaris@gmail.com>