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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: windriver.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: PH0PR11MB5175.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 1e0df46d-1dda-45f6-e5d2-08d972fcecf9 X-MS-Exchange-CrossTenant-originalarrivaltime: 08 Sep 2021 19:14:47.9893 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 8ddb2873-a1ad-4a18-ae4e-4644631433be X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: wY3vWU1gGQsLWIKE+toIQdYwpcS+uU5n2siSXVCyinW23UBx7ZNJ16YKuWmOgSK7hNxQwUPRJopemgKPprkqCV2CyoLnYm73hquWgFHn7is= X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR11MB5157 X-Proofpoint-ORIG-GUID: y0YwVxZOz6wFDfQ8L1f9aJOgINH3TpMA X-Proofpoint-GUID: y0YwVxZOz6wFDfQ8L1f9aJOgINH3TpMA X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.182.1,Aquarius:18.0.790,Hydra:6.0.391,FMLib:17.0.607.475 definitions=2021-09-08_06,2021-09-07_02,2020-04-07_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 spamscore=0 adultscore=0 phishscore=0 clxscore=1011 mlxlogscore=999 priorityscore=1501 impostorscore=0 lowpriorityscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2109030001 definitions=main-2109080121 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----Original Message----- > From: Ertman, David M > Sent: Thursday, September 9, 2021 1:31 AM > To: Leon Romanovsky ; Liu, Yongxin > > Cc: Saleem, Shiraz ; Nguyen, Anthony L > ; netdev@vger.kernel.org; linux- > kernel@vger.kernel.org; davem@davemloft.net; Brandeburg, Jesse > ; intel-wired-lan@lists.osuosl.org; > kuba@kernel.org > Subject: RE: [PATCH net] ice: check whether AUX devices/drivers are suppo= rted > in ice_rebuild >=20 > > -----Original Message----- > > From: Leon Romanovsky > > Sent: Sunday, September 5, 2021 12:24 AM > > To: Yongxin Liu > > Cc: Ertman, David M ; Saleem, Shiraz > > ; Nguyen, Anthony L > > ; netdev@vger.kernel.org; linux- > > kernel@vger.kernel.org; davem@davemloft.net; Brandeburg, Jesse > > ; intel-wired-lan@lists.osuosl.org; > > kuba@kernel.org > > Subject: Re: [PATCH net] ice: check whether AUX devices/drivers are > > supported in ice_rebuild > > > > On Fri, Sep 03, 2021 at 09:25:00AM +0800, Yongxin Liu wrote: > > > In ice_rebuild(), check whether AUX devices/drivers are supported or > > > not before calling ice_plug_aux_dev(). > > > > > > Fix the following call trace, if RDMA functionality is not available. > > > > > > auxiliary ice.roce.0: adding auxiliary device failed!: -17 > > > sysfs: cannot create duplicate filename > '/bus/auxiliary/devices/ice.roce.0' > > > Workqueue: ice ice_service_task [ice] > > > Call Trace: > > > dump_stack_lvl+0x38/0x49 > > > dump_stack+0x10/0x12 > > > sysfs_warn_dup+0x5b/0x70 > > > sysfs_do_create_link_sd.isra.2+0xc8/0xd0 > > > sysfs_create_link+0x25/0x40 > > > bus_add_device+0x6d/0x110 > > > device_add+0x49d/0x940 > > > ? _printk+0x52/0x6e > > > ? _printk+0x52/0x6e > > > __auxiliary_device_add+0x60/0xc0 > > > ice_plug_aux_dev+0xd3/0xf0 [ice] > > > ice_rebuild+0x27d/0x510 [ice] > > > ice_do_reset+0x51/0xe0 [ice] > > > ice_service_task+0x108/0xe70 [ice] > > > ? __switch_to+0x13b/0x510 > > > process_one_work+0x1de/0x420 > > > ? apply_wqattrs_cleanup+0xc0/0xc0 > > > worker_thread+0x34/0x400 > > > ? apply_wqattrs_cleanup+0xc0/0xc0 > > > kthread+0x14d/0x180 > > > ? set_kthread_struct+0x40/0x40 > > > ret_from_fork+0x1f/0x30 > > > > > > Fixes: f9f5301e7e2d ("ice: Register auxiliary device to provide > > > RDMA") > > > Signed-off-by: Yongxin Liu > > > --- > > > drivers/net/ethernet/intel/ice/ice_main.c | 4 +++- > > > 1 file changed, 3 insertions(+), 1 deletion(-) > > > > > > diff --git a/drivers/net/ethernet/intel/ice/ice_main.c > > b/drivers/net/ethernet/intel/ice/ice_main.c > > > index 0d6c143f6653..98cc708e9517 100644 > > > --- a/drivers/net/ethernet/intel/ice/ice_main.c > > > +++ b/drivers/net/ethernet/intel/ice/ice_main.c > > > @@ -6466,7 +6466,9 @@ static void ice_rebuild(struct ice_pf *pf, > > > enum > > ice_reset_req reset_type) > > > /* if we get here, reset flow is successful */ > > > clear_bit(ICE_RESET_FAILED, pf->state); > > > > > > - ice_plug_aux_dev(pf); > > > + if (ice_is_aux_ena(pf)) > > > + ice_plug_aux_dev(pf); > > > + > > > > The change is ok, but it hints that auxiliary bus is used horribly > > wrong in this driver. In proper implementation, which should rely on > > driver/core, every subdriver like ice.eth, ice.roce e.t.c is supposed > > to be retriggered by the code and shouldn't ave "if (ice_is_aux_ena(pf= ))" > checks. > > > > Thanks >=20 > Hi Leon and Liu - >=20 > First of all, thanks Liu for tracking this down - it is an issue that nee= ds > to be fixed. The ice_is_aux_ena() functions only purpose is to determine= if > this PF supports RDMA functionality. In probe(), the aux devices are not > even initialized if this test returns false. If this check fixed the iss= ue > for you, the PF you are on does not currently support RDMA. > The bit this test is based on is only set one place in the driver current= ly - > at probe time when we are checking the capabilities (common_caps) of the > device. >=20 > That being said, the call to check this should be in ice_plug_aux_dev > function itself. That way it is taken into account for all attempts to > create the auxiliary device. There is another consideration about disabl= ing > RDMA that needs to also needs to be taken into account to avoid a similar > situation. >=20 > If it is acceptable, I will create a new patch today and get it out eithe= r > this afternoon or tomorrow. Thanks Leon and Dave E for your quick response and input. Please go ahead and I am expecting this issue to be fixed in a more reasona= ble way. Thanks, Yongxin >=20 > Thanks, > Dave E >=20 > > > > > return; > > > > > > err_vsi_rebuild: > > > -- > > > 2.14.5 > > >