linux-kernel - Re: [PATCH] iio/pressure: Delete an error message for a failed memory allocation in hid_press

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Date:   Sun, 4 Feb 2018 10:58:39 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     linux-iio@...r.kernel.org, linux-input@...r.kernel.org,
        Archana Patni <archana.patni@...ux.intel.com>,
        Hartmut Knaack <knaack.h@....de>,
        Jiri Kosina <jikos@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] iio/pressure: Delete an error message for a failed
 memory allocation in hid_press_probe()

On Mon, 29 Jan 2018 22:04:11 +0100
SF Markus Elfring <elfring@...rs.sourceforge.net> wrote:

> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Mon, 29 Jan 2018 21:55:08 +0100
> 
> Omit an extra message for a memory allocation failure in this function.
> 
> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>

Whilst the error message doesn't add a lot, it does add some information
over a simple memory copy failed error.

Hence I think we should keep it.

Jonathan

> ---
>  drivers/iio/pressure/hid-sensor-press.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/iio/pressure/hid-sensor-press.c b/drivers/iio/pressure/hid-sensor-press.c
> index 4c437918f1d2..9de7590d50b0 100644
> --- a/drivers/iio/pressure/hid-sensor-press.c
> +++ b/drivers/iio/pressure/hid-sensor-press.c
> @@ -280,10 +280,8 @@ static int hid_press_probe(struct platform_device *pdev)
>  
>  	indio_dev->channels = kmemdup(press_channels, sizeof(press_channels),
>  				      GFP_KERNEL);
> -	if (!indio_dev->channels) {
> -		dev_err(&pdev->dev, "failed to duplicate channels\n");
> +	if (!indio_dev->channels)
>  		return -ENOMEM;
> -	}
>  
>  	ret = press_parse_report(pdev, hsdev,
>  				 (struct iio_chan_spec *)indio_dev->channels,