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Wysocki" , Bjorn Helgaas Cc: linux-kernel@vger.kernel.org, Len Brown , Darren Hart , patches@amperecomputing.com Subject: [PATCH v2 1/2] PCI: acpiphp: Allow built-in attention drivers Date: Fri, 29 Sep 2023 17:20:35 -0700 Message-ID: <20230930002036.6491-1-scott@os.amperecomputing.com> X-Mailer: git-send-email 2.41.0 X-ClientProxiedBy: CH2PR04CA0002.namprd04.prod.outlook.com (2603:10b6:610:52::12) To MWHPR0101MB2893.prod.exchangelabs.com (2603:10b6:301:33::25) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWHPR0101MB2893:EE_|BL1PR01MB7553:EE_ X-MS-Office365-Filtering-Correlation-Id: 8b3b86ef-1511-4106-f3bf-08dbc14b13c0 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:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:MWHPR0101MB2893.prod.exchangelabs.com;PTR:;CAT:NONE;SFS:(13230031)(346002)(396003)(39850400004)(136003)(366004)(376002)(230922051799003)(451199024)(1800799009)(186009)(64100799003)(2906002)(38100700002)(38350700002)(86362001)(110136005)(66946007)(6486002)(2616005)(66556008)(4326008)(41300700001)(478600001)(66476007)(54906003)(52116002)(8676002)(6666004)(5660300002)(316002)(83380400001)(6506007)(6512007)(8936002)(107886003)(1076003)(26005);DIR:OUT;SFP:1102; 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Fri, 29 Sep 2023 17:21:18 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1778438386857198533 X-GMAIL-MSGID: 1778438386857198533 Starting from the introduction of the attention callback in acpiphp, a non-zero struct module *owner field has been required in acpiphp_register_attention(). Then intent seemed to be that the core code could then hold a refcount on the module while invoking a callback. This check accidentally precludes the possiblity of attention callbacks to drivers which are built-in. Remove the check on `struct module *owner` in acpiphp_register_attention() so that attention callbacks can also be registered from built-in drivers. Signed-off-by: D Scott Phillips --- Changes since v1: - new patch in the series drivers/pci/hotplug/acpiphp_core.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/pci/hotplug/acpiphp_core.c b/drivers/pci/hotplug/acpiphp_core.c index c02257f4b61c4..9dad14e80bcf2 100644 --- a/drivers/pci/hotplug/acpiphp_core.c +++ b/drivers/pci/hotplug/acpiphp_core.c @@ -78,8 +78,7 @@ int acpiphp_register_attention(struct acpiphp_attention_info *info) { int retval = -EINVAL; - if (info && info->owner && info->set_attn && - info->get_attn && !attention_info) { + if (info && info->set_attn && info->get_attn && !attention_info) { retval = 0; attention_info = info; }