netdev - Re: [PATCH 1/9] ocrdma: Driver for Emulex OneConnect RDMA adapter

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Date:	Wed, 21 Mar 2012 09:45:49 -0700
From:	Roland Dreier <roland@...estorage.com>
To:	parav.pandit@...lex.com
Cc:	linux-rdma@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 1/9] ocrdma: Driver for Emulex OneConnect RDMA adapter

On Tue, Mar 20, 2012 at 3:39 PM,  <parav.pandit@...lex.com> wrote:
> +struct ocrdma_queue_info {
> +       void *va;
> +       dma_addr_t dma;
> +       u32 size;
> +       u16 len;
> +       u16 entry_size;         /* Size of an element in the queue */
> +       u16 id;                 /* qid, where to ring the doorbell. */
> +       u16 head, tail;
> +       bool created;
> +       atomic_t used;          /* Number of valid elements in the queue */
> +};

Forgot to mention this before... the only place the used member is touched
that I can find is

> +static inline void ocrdma_mq_inc_head(struct ocrdma_dev *dev)
> +{
> +	dev->mq.sq.head = (dev->mq.sq.head + 1) & (OCRDMA_MQ_LEN - 1);
> +	atomic_inc(&dev->mq.sq.used);
> +}

but I don't see anywhere that it gets read.  Can "used" be deleted?

 - R.
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