From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S934412AbdBQQAA (ORCPT <rfc822;w@1wt.eu>);
        Fri, 17 Feb 2017 11:00:00 -0500
Received: from userp1040.oracle.com ([156.151.31.81]:41049 "EHLO
        userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S934037AbdBQP76 (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Fri, 17 Feb 2017 10:59:58 -0500
Date: Fri, 17 Feb 2017 18:59:34 +0300
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Colin King <colin.king@canonical.com>
Cc: Selvin Xavier <selvin.xavier@broadcom.com>,
        Devesh Sharma <devesh.sharma@broadcom.com>,
        Somnath Kotur <somnath.kotur@broadcom.com>,
        Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>,
        Doug Ledford <dledford@redhat.com>, Sean Hefty <sean.hefty@intel.com>,
        Hal Rosenstock <hal.rosenstock@gmail.com>, linux-rdma@vger.kernel.org,
        kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] RDMA/bnxt_re: remove redundant initialization of rc to
 zero
Message-ID: <20170217155934.GE4108@mwanda>
References: <20170217153522.30988-1-colin.king@canonical.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20170217153522.30988-1-colin.king@canonical.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
X-Source-IP: userv0022.oracle.com [156.151.31.74]
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

drivers/infiniband/hw/bnxt_re/ib_verbs.c
  2817  int bnxt_re_dereg_mr(struct ib_mr *ib_mr)
  2818  {
  2819          struct bnxt_re_mr *mr = container_of(ib_mr, struct bnxt_re_mr, ib_mr);
  2820          struct bnxt_re_dev *rdev = mr->rdev;
  2821          int rc = 0;

It's weird that it would complain about this because initializing
variables to bogus values is a prefered style for some people.  It's
bad style obviously, yes, but it's common and it seems like it would
lead to a lot of false postives.

  2822  
  2823          if (mr->npages && mr->pages) {
  2824                  rc = bnxt_qplib_free_fast_reg_page_list(&rdev->qplib_res,
  2825                                                          &mr->qplib_frpl);

And then it doesn't complain about this one which seems like a legit
bug.

  2826                  kfree(mr->pages);
  2827                  mr->npages = 0;
  2828                  mr->pages = NULL;
  2829          }
  2830          rc = bnxt_qplib_free_mrw(&rdev->qplib_res, &mr->qplib_mr);
  2831  
  2832          if (!IS_ERR(mr->ib_umem) && mr->ib_umem)
  2833                  ib_umem_release(mr->ib_umem);
  2834  
  2835          kfree(mr);
  2836          atomic_dec(&rdev->mr_count);
  2837          return rc;
  2838  }

regards,
dan carpenter