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Tue, 3 Feb 2026 01:00:09 +0000 Message-ID: Date: Mon, 2 Feb 2026 17:00:08 -0800 User-Agent: Mozilla Thunderbird Subject: Re: [Intel-wired-lan] [PATCH net] iavf: fix deadlock in reset handling To: Jakub Kicinski , Petr Oros CC: , , , Andrew Lunn , "Eric Dumazet" , Stanislav Fomichev , "Tony Nguyen" , Przemek Kitszel , , "Paolo Abeni" , "David S. Miller" References: <20260202084820.260033-1-poros@redhat.com> <20260202155813.3f8fbc27@kernel.org> Content-Language: en-US From: Jacob Keller In-Reply-To: <20260202155813.3f8fbc27@kernel.org> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MW4PR03CA0002.namprd03.prod.outlook.com (2603:10b6:303:8f::7) To CO1PR11MB5089.namprd11.prod.outlook.com (2603:10b6:303:9b::16) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PR11MB5089:EE_|BL1PR11MB5979:EE_ X-MS-Office365-Filtering-Correlation-Id: b13c9748-11de-41a6-7f77-08de62bf940c X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|7416014|376014|1800799024; X-Microsoft-Antispam-Message-Info: =?utf-8?B?YWFheGNqRXJiRUYwcVlKdC9ScTBYdnBHcUNyeWMvN3oxV0twbm1KMzdHUFVl?= =?utf-8?B?VFhHa1BQbkFlRkszV29lWlpvcTl3RzFPQ1FUR0RaR09hMkhjdXZScVp1UWRD?= =?utf-8?B?TTVaODdtakoxdmcwVzBKb2RFUlhhZXRYZkZTN3VNUW9EYnB3MXJyMGNZMWwz?= =?utf-8?B?RVhRemVPeWU2b1RCU1ZPL0tuV1VobXkxMUxVajNmaldBVWVaS1pPYzBDMnhJ?= =?utf-8?B?NGVibEdlcGFEeDc3dUY4c3B6dUdnYXliaEJDbldJTU1sV1pMK296aTBZTitJ?= =?utf-8?B?cTRUWWUzc0lHUTJtODRRbUp4a3JsOEMvd3pTV2RETldpWGdWaXc4UkJoRnAx?= =?utf-8?B?b2VkMjFjSTdZdXF1MUltTEtaZ3ZUQjRReFgyUCs5bXM2aFlzbzJ4R2hjUWta?= =?utf-8?B?cnpzLzZxcmR4T1M5enNzZThBWGZtSW1DQ3NwRCt5Q3lkNjJ3azhoU3lCMTQz?= =?utf-8?B?clgraVJaUHl1RVE1dmNIdE43Q2dZODJCOTkyOXEyWHZaT29DaUhEUWMwNkFG?= =?utf-8?B?MXRwRExaRkt1ZDdEdFZFbEhOUUJRbzJJenE3cXZJTEtWdXJ5aHlCQWZjckFq?= =?utf-8?B?eDlOeHM3RWNoKy83VlFSSms2bXZ0WjNYcHFsczhBL2NWYmVEUWhjR0c5aVBV?= =?utf-8?B?MWZRQ2E1UkNNcFlEQjVvdnRaSHVQQm51a1RRQjRqS0Frd3hIb2RVWXRVOGdx?= =?utf-8?B?SWxpZU9oemJYMDJFbnRRYU51M2hYYUpZUWwxTmpBWU00cXQ2TE5JRExvWEFJ?= =?utf-8?B?RUMxd2lJNENVUERmK01iQzB2Z0N0ZjM1SHl3R3Z6Zm9qU2tkaXZIVll3V1R3?= =?utf-8?B?MFI2S1FkUUkwYVpQZzRORHlhbHZzb0xOaDVFaDBKUG1vdWVncmFGMmoybDhH?= =?utf-8?B?TVgvREVnRnVjQkNRNFFKVlFLaXIrb2t4TWlNL3RCdXEzN3doRFNiMWtqRE1a?= =?utf-8?B?Ny9kUURGY09ZNjF5SzNnSStkaDZlZUJyNnlxM3dCTHE3UU85TTg5U1E3ank5?= =?utf-8?B?VlRXL3E3b3hpdzI3eWYxeTA5ZWVBNENIUUJoRW56Rm14Tm5ZZmFFU3MzMEFG?= =?utf-8?B?YVRWcFRvd0MzVldVQ1lZcGN4NkZMNUJ4bkJ3Rk9sSDJHbDRrbk9vQUtLYUZZ?= =?utf-8?B?ejE2Y0owZ2pSNzQzcWsvc3pWbG5oZUNpcTBLWHlSVFYvd0JBQTlsWEI3TTVY?= =?utf-8?B?UkFRL0NlS0xoVXhWQjdwWWZIemZpZkRDbHJCWGlFejVnb1h0bHZqU3dYYS9u?= =?utf-8?B?UG1pMXpNZ1FUQUtIY29RZTZIR3ZrUmtKeHpveEdVSG5hNXNMMm85azBidWY0?= =?utf-8?B?SXRqRWJQS2hZb3R1RTh3ekRDM2M1dVJTQlppS3RIcTBBbkVkYXdLc21kR2VB?= =?utf-8?B?Umw3VjJ6eGk2T3pMTXpVTTdFbkx4blVNcU1HdG5SUDV0UzZrQkZGMnF4ZFR0?= =?utf-8?B?cEt5YlFUd3NYZjk0Z1ZpTzRWNFh0MDM4QUpUY3V2TkxhM2JreENwUDV6RW9H?= =?utf-8?B?N1ZZdTRMd1Y4VUk0N21xVktKQWNhaHlaNlBQVFNrZnY3Ylo5ZDRMeFZXSW9T?= =?utf-8?B?WW4xUkVqU2djdU1RS3VVL1o5WG12NThBa0ExUHVyWDBMd00veXRjREwxLzBB?= =?utf-8?B?WURQSlFQY1htM3Zva0N2Sk5KTURQVGF5dUlQY3RvUDNYOWRaSnpVSnNXV3Mz?= =?utf-8?B?R0tIU2l0eE51MWUwclQ3dHpodTBqcFB0aUFBd0NKRlY3cStucFQ3TXpVODg1?= =?utf-8?B?TXlIeHM4NVVNYlkzeW1rendmZnh2QWJSNkdtRWE3VGVOSitXZWxObmxHQWNO?= =?utf-8?B?NTFqL1RGRDdKYnJheHh3M2p5K0pZbFNLdFhmMkdZSGhTMlp4dmxnNUhpQVFj?= =?utf-8?B?dmJNbEpYeE4xS1I4QldRUzNxK3JXblhweVFXUE5ldUpFajRUWS9OVXFBWHdY?= =?utf-8?B?ZStJdHNBZFdQcXJralhWcTNPblllVDBEeTQ0SXR3Y0dxRklDYTdBYU9VVzNF?= =?utf-8?B?aVN2R0pnOFNFZHhuOENXTGU1c1lna29TYVdRcGhJZE9zeGcxbnR6UXNPQjJP?= =?utf-8?B?Ly9ackFHNko4VE85ZWdGU2NqQnNaL2VMcUFJdEZ2ZjRRcExabXJOZk93V05s?= =?utf-8?Q?35TM=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CO1PR11MB5089.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(7416014)(376014)(1800799024);DIR:OUT;SFP:1101; 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>> + ret = wait_event_interruptible_timeout(adapter->reset_waitqueue, >> + !iavf_is_reset_in_progress(adapter), >> + msecs_to_jiffies(5000)); >> + netdev_lock(netdev); > > Dropping locks taken by the core around the driver callback > is obviously unacceptable. SMH. Right. It seems like the correct fix is to either a) have reset take and hold the netdev lock (now that its distinct from the global RTNL lock) or b) refactor reset so that it can defer any of the netdev related stuff somehow.