linux-kernel - Re: [PATCH][next] IB/rdmavt: Use struct

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Date:   Thu, 30 May 2019 15:43:02 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     Dennis Dalessandro <dennis.dalessandro@...el.com>,
        Mike Marciniszyn <mike.marciniszyn@...el.com>,
        Doug Ledford <dledford@...hat.com>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] IB/rdmavt: Use struct_size() helper

On Wed, May 29, 2019 at 10:12:48AM -0500, Gustavo A. R. Silva wrote:
> Make use of the struct_size() helper instead of an open-coded version
> in order to avoid any potential type mistakes, in particular in the
> context in which this code is being used.
> 
> So, replace the following form:
> 
> sizeof(struct rvt_sge) * init_attr->cap.max_send_sge + sizeof(struct rvt_swqe)
> 
> with:
> 
> struct_size(swq, sg_list, init_attr->cap.max_send_sge)
> 
> and so on...
> 
> Also, notice that variable size is unnecessary, hence it is removed.
> 
> This code was detected with the help of Coccinelle.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
> Reviewed-by: Dennis Dalessandro <dennis.dalessandro@...el.com>
> ---
>  drivers/infiniband/sw/rdmavt/qp.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)

Applied to for-next, thanks

Jason