linux-kernel - Re: [patch 1/2] misc: mic/scif: fix error code in scif_create_remote

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Date:	Sun, 11 Oct 2015 02:14:19 -0700
From:	Sudeep Dutt <sudeep.dutt@...el.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	Sudeep Dutt <sudeep.dutt@...el.com>,
	Nikhil Rao <nikhil.rao@...el.com>,
	Ashutosh Dixit <ashutosh.dixit@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [patch 1/2] misc: mic/scif: fix error code in
 scif_create_remote_lookup()

On Fri, 2015-10-09 at 09:41 +0300, Dan Carpenter wrote:
> We should be returning -ENOMEM here instead of success.
> 

Reviewed-by: Sudeep Dutt <sudeep.dutt@...el.com>

Thanks for the fix!

> Fixes: ba612aa8b487 ('misc: mic: SCIF memory registration and unregistration')
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> 
> diff --git a/drivers/misc/mic/scif/scif_rma.c b/drivers/misc/mic/scif/scif_rma.c
> index e288996..bc2dccb 100644
> --- a/drivers/misc/mic/scif/scif_rma.c
> +++ b/drivers/misc/mic/scif/scif_rma.c
> @@ -386,16 +386,20 @@ static int scif_create_remote_lookup(struct scif_dev *remote_dev,
>  				    remote_dev, window->nr_lookup *
>  				    sizeof(*window->dma_addr_lookup.lookup),
>  				    GFP_KERNEL | __GFP_ZERO);
> -	if (!window->dma_addr_lookup.lookup)
> +	if (!window->dma_addr_lookup.lookup) {
> +		err = -ENOMEM;
>  		goto error_window;
> +	}
>  
>  	window->num_pages_lookup.lookup =
>  		scif_alloc_coherent(&window->num_pages_lookup.offset,
>  				    remote_dev, window->nr_lookup *
>  				    sizeof(*window->num_pages_lookup.lookup),
>  				    GFP_KERNEL | __GFP_ZERO);
> -	if (!window->num_pages_lookup.lookup)
> +	if (!window->num_pages_lookup.lookup) {
> +		err = -ENOMEM;
>  		goto error_window;
> +	}
>  
>  	vmalloc_dma_phys = is_vmalloc_addr(&window->dma_addr[0]);
>  	vmalloc_num_pages = is_vmalloc_addr(&window->num_pages[0]);


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