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

Yuval Shaia
2017-03-08T14:27:07Z

On Wed, Mar 08, 2017 at 02:07:01PM +0100, SF Markus Elfring wrote:
> From: Markus Elfring <elfring-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
> 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-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>

>
> Thus fix the affected source code places.

Above line can be removed.

>
> Signed-off-by: Markus Elfring <elfring-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
> ---
> 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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