linux-kernel - Re: [PATCH 12/26] IB/ocrdma: Adjust ten checks for null pointers

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Date:   Wed, 8 Mar 2017 16:27:07 +0200
From:   Yuval Shaia <yuval.shaia@...cle.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     linux-rdma@...r.kernel.org,
        Devesh Sharma <devesh.sharma@...gotech.com>,
        Doug Ledford <dledford@...hat.com>,
        Hal Rosenstock <hal.rosenstock@...il.com>,
        Sean Hefty <sean.hefty@...el.com>,
        Selvin Xavier <selvin.xavier@...gotech.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 12/26] IB/ocrdma: Adjust ten checks for null pointers

On Wed, Mar 08, 2017 at 02:07:01PM +0100, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Tue, 7 Mar 2017 21:32:22 +0100
> MIME-Version: 1.0
> Content-Type: text/plain; charset=UTF-8
> Content-Transfer-Encoding: 8bit
> 
> The script “checkpatch.pl“ pointed information out like the following.
> 
> Comparison to NULL could be written !…

Good to know.

Reviewed-by: Yuval Shaia <yuval.shaia@...cle.com>


> 
> Thus fix the affected source code places.

Above line can be removed.

> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/infiniband/hw/ocrdma/ocrdma_hw.c | 20 ++++++++++----------
>  1 file changed, 10 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
> index d5b988b011d1..8c7f0b108a7f 100644
> --- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
> +++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
> @@ -665,7 +665,7 @@ static void ocrdma_process_qpcat_error(struct ocrdma_dev *dev,
>  	enum ib_qp_state new_ib_qps = IB_QPS_ERR;
>  	enum ib_qp_state old_ib_qps;
>  
> -	if (qp == NULL)
> +	if (!qp)
>  		BUG();
>  	ocrdma_qp_state_change(qp, new_ib_qps, &old_ib_qps);
>  }
> @@ -693,7 +693,7 @@ static void ocrdma_dispatch_ibevent(struct ocrdma_dev *dev,
>  	if (cqe->qpvalid_qpid & OCRDMA_AE_MCQE_QPVALID) {
>  		if (qpid < dev->attr.max_qp)
>  			qp = dev->qp_tbl[qpid];
> -		if (qp == NULL) {
> +		if (!qp) {
>  			pr_err("ocrdma%d:Async event - qpid %u is not valid\n",
>  			       dev->id, qpid);
>  			return;
> @@ -703,7 +703,7 @@ static void ocrdma_dispatch_ibevent(struct ocrdma_dev *dev,
>  	if (cqe->cqvalid_cqid & OCRDMA_AE_MCQE_CQVALID) {
>  		if (cqid < dev->attr.max_cq)
>  			cq = dev->cq_tbl[cqid];
> -		if (cq == NULL) {
> +		if (!cq) {
>  			pr_err("ocrdma%d:Async event - cqid %u is not valid\n",
>  			       dev->id, cqid);
>  			return;
> @@ -882,7 +882,7 @@ static int ocrdma_mq_cq_handler(struct ocrdma_dev *dev, u16 cq_id)
>  
>  	while (1) {
>  		cqe = ocrdma_get_mcqe(dev);
> -		if (cqe == NULL)
> +		if (!cqe)
>  			break;
>  		ocrdma_le32_to_cpu(cqe, sizeof(*cqe));
>  		cqe_popped += 1;
> @@ -948,7 +948,7 @@ static void ocrdma_qp_buddy_cq_handler(struct ocrdma_dev *dev,
>  	 * false - Check for RQ CQ
>  	 */
>  	bcq = _ocrdma_qp_buddy_cq_handler(dev, cq, true);
> -	if (bcq == NULL)
> +	if (!bcq)
>  		bcq = _ocrdma_qp_buddy_cq_handler(dev, cq, false);
>  	spin_unlock_irqrestore(&dev->flush_q_lock, flags);
>  
> @@ -969,7 +969,7 @@ static void ocrdma_qp_cq_handler(struct ocrdma_dev *dev, u16 cq_idx)
>  		BUG();
>  
>  	cq = dev->cq_tbl[cq_idx];
> -	if (cq == NULL)
> +	if (!cq)
>  		return;
>  
>  	if (cq->ibcq.comp_handler) {
> @@ -1289,7 +1289,7 @@ int ocrdma_mbx_rdma_stats(struct ocrdma_dev *dev, bool reset)
>  	int status;
>  
>  	old_stats = kmalloc(sizeof(*old_stats), GFP_KERNEL);
> -	if (old_stats == NULL)
> +	if (!old_stats)
>  		return -ENOMEM;
>  
>  	memset(mqe, 0, sizeof(*mqe));
> @@ -1676,12 +1676,12 @@ static int ocrdma_mbx_create_ah_tbl(struct ocrdma_dev *dev)
>  	dev->av_tbl.pbl.va = dma_alloc_coherent(&pdev->dev, PAGE_SIZE,
>  						&dev->av_tbl.pbl.pa,
>  						GFP_KERNEL);
> -	if (dev->av_tbl.pbl.va == NULL)
> +	if (!dev->av_tbl.pbl.va)
>  		goto mem_err;
>  
>  	dev->av_tbl.va = dma_alloc_coherent(&pdev->dev, dev->av_tbl.size,
>  					    &pa, GFP_KERNEL);
> -	if (dev->av_tbl.va == NULL)
> +	if (!dev->av_tbl.va)
>  		goto mem_err_ah;
>  	dev->av_tbl.pa = pa;
>  	dev->av_tbl.num_ah = max_ah;
> @@ -1722,7 +1722,7 @@ static void ocrdma_mbx_delete_ah_tbl(struct ocrdma_dev *dev)
>  	struct ocrdma_delete_ah_tbl *cmd;
>  	struct pci_dev *pdev = dev->nic_info.pdev;
>  
> -	if (dev->av_tbl.va == NULL)
> +	if (!dev->av_tbl.va)
>  		return;
>  
>  	cmd = ocrdma_init_emb_mqe(OCRDMA_CMD_DELETE_AH_TBL, sizeof(*cmd));
> -- 
> 2.12.0
> 
> --
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