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Mon, 13 Jul 2026 11:32:32 -0700 Date: Mon, 13 Jul 2026 11:32:30 -0700 From: Nicolin Chen To: Baolu Lu CC: Will Deacon , Robin Murphy , "Joerg Roedel" , Bjorn Helgaas , "Jason Gunthorpe" , "Rafael J . Wysocki" , "Len Brown" , Pranjal Shrivastava , "Mostafa Saleh" , Kevin Tian , , , , , , , Shuai Xue Subject: Re: [PATCH v5 05/18] iommu: Pass in reset result to pci_dev_reset_iommu_done() Message-ID: References: <9306670b5bd647e477e36156b124557917baead3.1783044582.git.nicolinc@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM2PEPF00003FC6:EE_|BY5PR12MB4145:EE_ X-MS-Office365-Filtering-Correlation-Id: d9e197e4-f70a-4879-d160-08dee10d2908 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|36860700016|1800799024|376014|82310400026|23010399003|22082099003|18002099003|56012099006|11063799006|4143699003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(7416014)(36860700016)(1800799024)(376014)(82310400026)(23010399003)(22082099003)(18002099003)(56012099006)(11063799006)(4143699003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: mJFX9EMVAdiaH28HZQi/nhqXbPDWTFduAdZZnlrQdeG5/ehCvIACzhqBUe/zQwC2u8OgzOjDPbtyLemNB+1a/zAX1uTMwSKC6Sr00oKIxkVG4uxXws08Z3+aVRZV4bOyNyQgz9X3rwHWfT7YWZIpSjjwjhKpjGoRZ3g3gO02XDVlQTWlS6W0AwXlXRVILKaj6Ig0qRkFGsYv85VbcSL0JOj4LK4zJfumYnYvTEq8e9E3WR6nCPD3mAvwcphHUlfRuImiU9d6f5RVtxf3g+3om60lu8Jh6JfKl2ayGJpIPcxgreiWa1+TLAKP7rWM8OZEtn8izM2f0ZwUmWOG6TY4rTqjvqvX32gdN29sVwlK3JdZ/5ZY5i9LDlwuFczV1mMmjHo+G7eJFDDx2zBlMSWquiC6zxTQbyo752CMgMU40Tz+A4DG6c29u5P9PDY8ZbUr X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jul 2026 18:32:57.0987 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d9e197e4-f70a-4879-d160-08dee10d2908 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM2PEPF00003FC6.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4145 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260713_113308_320224_17547D54 X-CRM114-Status: GOOD ( 14.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Jul 13, 2026 at 07:48:53PM +0800, Baolu Lu wrote: > On 7/3/2026 12:06 PM, Nicolin Chen wrote: > > @@ -762,6 +763,9 @@ static void __iommu_group_remove_device(struct device *dev) > > if (device->dev != dev) > > continue; > > + /* Must drop the recovery_cnt when removing a blocked device */ > > + if (device->blocked && !WARN_ON(group->recovery_cnt == 0)) > > + group->recovery_cnt--; > > I feel that the change above is unrelated to the purpose of this patch. > It looks like an independent fix that belongs to a separate patch. It's actually related; I had this in the commit message: " This introduces a new situation where a blocked device is being unplugged. Decrement the group->recovery_cnt accordingly. " So, it was not needed prior to this patch: it wouldn't fix anything if applied before, and it would be a bit odd to apply/fix after. It's a small three-line change, so I think folding it in is okay? Thanks Nicolin