linux-kernel - Re: [Openipmi-developer] [PATCH] ipmi: ipmi-bmc: Improve errno returned to userspace

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Date:   Thu, 20 Apr 2023 07:10:58 -0500
From:   Corey Minyard <minyard@....org>
To:     Andrew Jeffery <andrew@...id.au>,
        Govert Overgaauw <govert.overgaauw@...drive-technologies.com>
Cc:     openipmi-developer@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [Openipmi-developer] [PATCH] ipmi: ipmi-bmc: Improve errno
 returned to userspace

Andrew, what do you think?

-corey

On Wed, Apr 19, 2023 at 05:00:32PM +0200, Govert Overgaauw via Openipmi-developer wrote:
> While the KCS driver is not in KCS_PHASE_WAIT_READ state it returns
> -EINVAL to userspace on a write call. change this to -EAGAIN to indicate
> that the error is related to the state and not the argument.
> 
> Signed-off-by: Govert Overgaauw <govert.overgaauw@...drive-technologies.com>
> ---
>  drivers/char/ipmi/kcs_bmc_cdev_ipmi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/char/ipmi/kcs_bmc_cdev_ipmi.c b/drivers/char/ipmi/kcs_bmc_cdev_ipmi.c
> index cf670e891966..4c7400faf333 100644
> --- a/drivers/char/ipmi/kcs_bmc_cdev_ipmi.c
> +++ b/drivers/char/ipmi/kcs_bmc_cdev_ipmi.c
> @@ -405,7 +405,7 @@ static ssize_t kcs_bmc_ipmi_write(struct file *filp, const char __user *buf,
>  		kcs_bmc_write_data(priv->client.dev, priv->data_out[0]);
>  		ret = count;
>  	} else {
> -		ret = -EINVAL;
> +		ret = -EAGAIN;
>  	}
>  	spin_unlock_irq(&priv->lock);
>  
> -- 
> 2.30.2
> 
> 
> 
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