linux-kernel - Re: [PATCH 13/18] staging: gasket: gasket_enable

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Message-ID: <20180714063904.GH20451@kroah.com>
Date:   Sat, 14 Jul 2018 08:39:04 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Todd Poynor <toddpoynor@...il.com>
Cc:     Rob Springer <rspringer@...gle.com>,
        John Joseph <jnjoseph@...gle.com>,
        Ben Chan <benchan@...omium.org>, devel@...verdev.osuosl.org,
        Zhongze Hu <frankhu@...omium.org>,
        linux-kernel@...r.kernel.org, Simon Que <sque@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        Todd Poynor <toddpoynor@...gle.com>,
        Dmitry Torokhov <dtor@...omium.org>
Subject: Re: [PATCH 13/18] staging: gasket: gasket_enable_dev fixups

On Fri, Jul 13, 2018 at 10:58:11PM -0700, Todd Poynor wrote:
> From: Todd Poynor <toddpoynor@...gle.com>
> 
> Remove unnecessary variable.
> 
> Bail out if no physical device.
> 
> Signed-off-by: Todd Poynor <toddpoynor@...gle.com>
> ---
>  drivers/staging/gasket/gasket_core.c | 19 ++++++-------------
>  1 file changed, 6 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/staging/gasket/gasket_core.c b/drivers/staging/gasket/gasket_core.c
> index 65aa7cf454fb..f7d8f66e8746 100644
> --- a/drivers/staging/gasket/gasket_core.c
> +++ b/drivers/staging/gasket/gasket_core.c
> @@ -915,8 +915,6 @@ static int gasket_enable_dev(
>  {
>  	int tbl_idx;
>  	int ret;
> -	bool has_dma_ops;
> -	struct device *ddev;
>  	const struct gasket_driver_desc *driver_desc =
>  		internal_desc->driver_desc;
>  
> @@ -934,26 +932,21 @@ static int gasket_enable_dev(
>  		return ret;
>  	}
>  
> -	has_dma_ops = true;
> +	if (!gasket_dev->pci_dev) {
> +		gasket_log_error(gasket_dev,
> +				 "%s: no physical device", __func__);
> +		return -ENODEV;
> +	}

How can this ever be true?  I don't see where this can be removed to
enable this error check to be hit.  What am I missing?

thanks,

greg k-h