Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Wed, 24 Jul 2019 16:31:57 -0300
From:   Jason Gunthorpe <jgg@ziepe.ca>
To:     Colin King <colin.king@canonical.com>
Cc:     Lijun Ou <oulijun@huawei.com>, Wei Hu <xavier.huwei@huawei.com>,
        Doug Ledford <dledford@redhat.com>, linux-rdma@vger.kernel.org,
        kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2][next] RDMA/hns: fix comparison of unsigned long
 variable 'end' with less than zero
Message-ID: <20190724193157.GA6620@ziepe.ca>
References: <20190531092101.28772-1-colin.king@canonical.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20190531092101.28772-1-colin.king@canonical.com>
User-Agent: Mutt/1.9.4 (2018-02-28)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Fri, May 31, 2019 at 10:21:00AM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> Currently the comparison of end with less than zero is always false
> because end is an unsigned long.  Also, replace checks of end with
> non-zero with end > 0 as it is possible that the #defined decrement
> may be changed in the future causing end to step over zero and go
> negative.
> 
> The initialization of end with 0 is also redundant as this value is
> never read and is later set to HW_SYNC_TIMEOUT_MSECS, so fix this by
> initializing it with this value to begin with.
> 
> Addresses-Coverity: ("Unsigned compared against 0")
> Fixes: 669cefb654cb ("RDMA/hns: Remove jiffies operation in disable interrupt context")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
>  drivers/infiniband/hw/hns/hns_roce_hem.c   |  4 ++--
>  drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 12 ++++++------
>  2 files changed, 8 insertions(+), 8 deletions(-)

Applied to for-next, thanks

Jason