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Wed, 20 Nov 2019 09:02:51 +0000 Received: from AM0PR0502MB4019.eurprd05.prod.outlook.com ([fe80::cd03:4e5a:4ef7:6ea5]) by AM0PR0502MB4019.eurprd05.prod.outlook.com ([fe80::cd03:4e5a:4ef7:6ea5%6]) with mapi id 15.20.2474.015; Wed, 20 Nov 2019 09:02:51 +0000 From: Matan Azrad To: Thomas Monjalon CC: "stable@dpdk.org" , "dev@dpdk.org" , Gaetan Rivet , Bernard Iremonger , "mukawa@igel.co.jp" , "david.marchand@redhat.com" Thread-Topic: [dpdk-stable] [PATCH 1/2] bus/pci: fix driver detach clear Thread-Index: AQHVnypXIj3Uiax61UKUHPOsaICzAKeTvgqw Date: Wed, 20 Nov 2019 09:02:51 +0000 Message-ID: References: <1573548459-6931-1-git-send-email-matan@mellanox.com> <1939572.QzvFjc1F9H@xps> In-Reply-To: <1939572.QzvFjc1F9H@xps> Accept-Language: en-US, he-IL Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=matan@mellanox.com; x-originating-ip: [193.47.165.251] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: be2e0f32-3592-40f5-3073-08d76d986c6c x-ms-traffictypediagnostic: AM0PR0502MB3811: x-ld-processed: a652971c-7d2e-4d9b-a6a4-d149256f461b,ExtAddr x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:9508; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Mellanox.com X-MS-Exchange-CrossTenant-Network-Message-Id: be2e0f32-3592-40f5-3073-08d76d986c6c X-MS-Exchange-CrossTenant-originalarrivaltime: 20 Nov 2019 09:02:51.6511 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a652971c-7d2e-4d9b-a6a4-d149256f461b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: woWJ3yY0UD3wuPtvoD1VB+9yhNOrjCpJr0pOt8Lt+GYK0efMFluLD6piMPKjgoApP0ifAO61p+fWQP/1+Ap+Cg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR0502MB3811 Subject: Re: [dpdk-dev] [dpdk-stable] [PATCH 1/2] bus/pci: fix driver detach clear X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Hi From: Thomas Monjalon > 12/11/2019 09:47, Matan Azrad: > > When a rte_device is unplugged, the driver should be detached from the > > device. >=20 > Yes >=20 > > The PCI detach driver operation wrongly didn't clear the driver from > > the device structure what remain the device in probe state from the > > EAL point of view. >=20 > Are you aware of an use case which is broken because of that? Yes, will add a small example. >=20 > > --- a/drivers/bus/pci/pci_common.c > > +++ b/drivers/bus/pci/pci_common.c > > @@ -247,6 +247,7 @@ static struct rte_devargs > > *pci_devargs_lookup(struct rte_pci_device *dev) >=20 > The git context above is wrong, it should show the function > rte_pci_detach_dev. >=20 > > /* clear driver structure */ > > dev->driver =3D NULL; > > + dev->device.driver =3D NULL; >=20 > It looks a good fix. > Acked-by: Thomas Monjalon >=20 > I am wondering if there could be a risk for any test application if appli= ed in > 19.11-rc3. > I think we should try to get it and revert if a side effect is discovered= . >=20