linux-kernel - Re: [PATCH 2/2] lightnvm: fix request intersection locking in rrpc

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Date:	Wed, 3 Feb 2016 09:53:51 +0100
From:	Matias Bjørling <mb@...htnvm.io>
To:	Javier González <jg@...htnvm.io>
Cc:	linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
	Javier González <javier@...xlabs.com>
Subject: Re: [PATCH 2/2] lightnvm: fix request intersection locking in rrpc

On 02/01/2016 11:34 AM, Javier González wrote:
> This patch fixes an error on the calculation of intersecting logical
> addresses; it contemplates the case where a new request including
> several addresses intersects with a single locked address. This case is
> typical when multiple pages are sent in a new request, while GC - which
> at the moment sends one address at the time - is running.
> 
> Signed-off-by: Javier González <javier@...xlabs.com>
> ---
>  drivers/lightnvm/rrpc.h | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/lightnvm/rrpc.h b/drivers/lightnvm/rrpc.h
> index c27283a..3989d65 100644
> --- a/drivers/lightnvm/rrpc.h
> +++ b/drivers/lightnvm/rrpc.h
> @@ -174,8 +174,7 @@ static inline sector_t rrpc_get_sector(sector_t laddr)
>  static inline int request_intersects(struct rrpc_inflight_rq *r,
>  				sector_t laddr_start, sector_t laddr_end)
>  {
> -	return (laddr_end >= r->l_start && laddr_end <= r->l_end) &&
> -		(laddr_start >= r->l_start && laddr_start <= r->l_end);
> +	return (laddr_end >= r->l_start) && (laddr_start <= r->l_end);
>  }
>  
>  static int __rrpc_lock_laddr(struct rrpc *rrpc, sector_t laddr,
> 
Thanks, applied for next -rc.