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Tsirkin" To: qemu-devel@nongnu.org Cc: Peter Maydell , Stefano Garzarella , Eugenio =?utf-8?B?UMOpcmV6?= , Jason Wang , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= Subject: [PULL v3 03/41] vhost-vdpa: check vhost_vdpa_set_vring_ready() return value Message-ID: <982ae85fe81e3849e27d9eacad85c2ffc131d7e3.1717630437.git.mst@redhat.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1717630559761100006 From: Stefano Garzarella vhost_vdpa_set_vring_ready() could already fail, but if Linux's patch [1] will be merged, it may fail with more chance if userspace does not activate virtqueues before DRIVER_OK when VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK is not negotiated. So better check its return value anyway. [1] https://lore.kernel.org/virtualization/20240206145154.118044-1-sgarzare= @redhat.com/T/#u Acked-by: Eugenio P=C3=A9rez Acked-by: Jason Wang Signed-off-by: Stefano Garzarella Message-Id: <20240322092315.31885-1-sgarzare@redhat.com> Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- net/vhost-vdpa.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index 85e73dd6a7..eda714d1a4 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -399,7 +399,10 @@ static int vhost_vdpa_net_data_load(NetClientState *nc) } =20 for (int i =3D 0; i < v->dev->nvqs; ++i) { - vhost_vdpa_set_vring_ready(v, i + v->dev->vq_index); + int ret =3D vhost_vdpa_set_vring_ready(v, i + v->dev->vq_index); + if (ret < 0) { + return ret; + } } return 0; } @@ -1238,7 +1241,10 @@ static int vhost_vdpa_net_cvq_load(NetClientState *n= c) =20 assert(nc->info->type =3D=3D NET_CLIENT_DRIVER_VHOST_VDPA); =20 - vhost_vdpa_set_vring_ready(v, v->dev->vq_index); + r =3D vhost_vdpa_set_vring_ready(v, v->dev->vq_index); + if (unlikely(r < 0)) { + return r; + } =20 if (v->shadow_vqs_enabled) { n =3D VIRTIO_NET(v->dev->vdev); @@ -1277,7 +1283,10 @@ static int vhost_vdpa_net_cvq_load(NetClientState *n= c) } =20 for (int i =3D 0; i < v->dev->vq_index; ++i) { - vhost_vdpa_set_vring_ready(v, i); + r =3D vhost_vdpa_set_vring_ready(v, i); + if (unlikely(r < 0)) { + return r; + } } =20 return 0; --=20 MST