From: "Michael S. Tsirkin" <mst@redhat.com>
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: "Jason Wang" <jasowang@redhat.com>,
"Tiwei Bie" <tiwei.bie@intel.com>,
"Eugenio Pérez" <eperezma@redhat.com>,
kvm@vger.kernel.org, virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] vhost: vdpa: remove unnecessary null check
Date: Tue, 31 Mar 2020 10:03:12 -0400 [thread overview]
Message-ID: <20200331100122-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20200330235040.GA9997@embeddedor>
On Mon, Mar 30, 2020 at 06:50:40PM -0500, Gustavo A. R. Silva wrote:
> container_of is never null, so this null check is
> unnecessary.
>
> Addresses-Coverity-ID: 1492006 ("Logically dead code")
> Fixes: 20453a45fb06 ("vhost: introduce vDPA-based backend")
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Yes weird. Was the point to test i_cdev? Tiwei?
> ---
> drivers/vhost/vdpa.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> index 421f02a8530a..3d2cb811757a 100644
> --- a/drivers/vhost/vdpa.c
> +++ b/drivers/vhost/vdpa.c
> @@ -678,8 +678,6 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep)
> int nvqs, i, r, opened;
>
> v = container_of(inode->i_cdev, struct vhost_vdpa, cdev);
> - if (!v)
> - return -ENODEV;
>
> opened = atomic_cmpxchg(&v->opened, 0, 1);
> if (opened)
> --
> 2.26.0
prev parent reply other threads:[~2020-03-31 14:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-30 23:50 [PATCH] vhost: vdpa: remove unnecessary null check Gustavo A. R. Silva
2020-03-31 2:35 ` Jason Wang
2020-03-31 14:03 ` Michael S. Tsirkin [this message]
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