From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gerd Hoffmann <kraxel@redhat.com>
Subject: Re: [PATCH 2/2] xen: drain submit queue in xen-usb
 before removing device
Date: Tue, 02 Aug 2016 13:37:36 +0200
Message-ID: <1470137856.30562.92.camel@redhat.com>
References: <1469791051-680-1-git-send-email-jgross@suse.com>
	<1469791051-680-3-git-send-email-jgross@suse.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Return-path: <qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org>
In-Reply-To: <1469791051-680-3-git-send-email-jgross@suse.com>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel/>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org
Sender: "Qemu-devel" <qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org>
To: Juergen Gross <jgross@suse.com>
Cc: anthony.perard@citrix.com, xen-devel@lists.xensource.com, sstabellini@kernel.org, qemu-devel@nongnu.org
List-Id: xen-devel@lists.xenproject.org

On Fr, 2016-07-29 at 13:17 +0200, Juergen Gross wrote:
> When unplugging a device in the Xen pvusb backend drain the submit
> queue before deallocation of the control structures. Otherwise there
> will be bogus memory accesses when I/O contracts are finished.
>=20
> Correlated to this issue is the handling of cancel requests: a packet
> cancelled will still lead to the call of complete, so add a flag
> A

=3D=3D=3D checkpatch complains =3D=3D=3D
WARNING: braces {} are necessary for all arms of this statement
#105: FILE: hw/usb/xen-usb.c:696:
+    if (sched)
[...]

WARNING: braces {} are necessary for all arms of this statement
#111: FILE: hw/usb/xen-usb.c:702:
+    if (!usbif->ports[port - 1].attached)
[...]

WARNING: braces {} are necessary for all arms of this statement
#152: FILE: hw/usb/xen-usb.c:847:
+        if (usbif->ports[i].dev)
[...]

cheers,
  Gerd