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Tsirkin" , Jason Wang , Xuan Zhuo , Xie Yongji CC: Dragos Tatulea , Gal Pressman , , Subject: [PATCH] virtio-vdpa: Fix unchecked call to NULL set_vq_affinity Date: Thu, 4 May 2023 16:50:52 +0300 Message-ID: <20230504135053.2283816-1-dtatulea@nvidia.com> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT053:EE_|DM4PR12MB6232:EE_ X-MS-Office365-Filtering-Correlation-Id: b57c4ddd-f6a0-48ab-0982-08db4ca6a0fd X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230028)(4636009)(39860400002)(136003)(396003)(376002)(346002)(451199021)(40470700004)(36840700001)(46966006)(1076003)(26005)(186003)(2616005)(336012)(426003)(54906003)(110136005)(83380400001)(36756003)(36860700001)(47076005)(6666004)(40460700003)(316002)(40480700001)(5660300002)(82740400003)(478600001)(2906002)(4744005)(4326008)(86362001)(41300700001)(8676002)(8936002)(356005)(7636003)(82310400005)(70206006)(70586007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 May 2023 13:51:15.1339 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b57c4ddd-f6a0-48ab-0982-08db4ca6a0fd X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT053.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6232 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The referenced patch calls set_vq_affinity without checking if the op is valid. This patch adds the check. Fixes: 3dad56823b53 ("virtio-vdpa: Support interrupt affinity spreading mec= hanism") Reviewed-by: Gal Pressman Signed-off-by: Dragos Tatulea Reviewed-by: Feng Liu --- drivers/virtio/virtio_vdpa.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index eb6aee8c06b2..989e2d7184ce 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -385,7 +385,9 @@ static int virtio_vdpa_find_vqs(struct virtio_device *v= dev, unsigned int nvqs, err =3D PTR_ERR(vqs[i]); goto err_setup_vq; } - ops->set_vq_affinity(vdpa, i, &masks[i]); + + if (ops->set_vq_affinity) + ops->set_vq_affinity(vdpa, i, &masks[i]); } =20 cb.callback =3D virtio_vdpa_config_cb; --=20 2.40.1