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Received: from DM8PR03MB6230.namprd03.prod.outlook.com (2603:10b6:8:3c::13) by CH4PR03MB7650.namprd03.prod.outlook.com (2603:10b6:610:235::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9611.10; Thu, 12 Feb 2026 02:35:54 +0000 Received: from DM8PR03MB6230.namprd03.prod.outlook.com ([fe80::abad:9d80:7a13:9542]) by DM8PR03MB6230.namprd03.prod.outlook.com ([fe80::abad:9d80:7a13:9542%4]) with mapi id 15.20.9611.008; Thu, 12 Feb 2026 02:35:54 +0000 Message-ID: <4be78b57-e2b7-43f8-be7a-e3db8f34b624@altera.com> Date: Thu, 12 Feb 2026 10:35:48 +0800 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] i3c: dw-i3c-master: Set SIR_REJECT in DAT on device attach and reattach To: Frank Li Cc: alexandre.belloni@bootlin.com, linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org References: <8bff67c9df8d56a3d5e0191bc935362ff6d3c573.1770796093.git.adrianhoyin.ng@altera.com> Content-Language: en-US From: "Ng, Adrian Ho Yin" In-Reply-To: X-ClientProxiedBy: SI2PR02CA0003.apcprd02.prod.outlook.com (2603:1096:4:194::13) To DM8PR03MB6230.namprd03.prod.outlook.com (2603:10b6:8:3c::13) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM8PR03MB6230:EE_|CH4PR03MB7650:EE_ X-MS-Office365-Filtering-Correlation-Id: 62313741-2587-4613-99ae-08de69df718f X-MS-Exchange-AtpMessageProperties: SA X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|366016|1800799024; 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charset="us-ascii"; Format="flowed" Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org On 2/11/2026 11:39 PM, Frank Li wrote: > On Wed, Feb 11, 2026 at 03:49:21PM +0800, adrianhoyin.ng@altera.com wrote: >> From: Adrian Ng Ho Yin >> >> The DesignWare I3C master controller ACKs IBIs as soon as a valid >> Device Address Table (DAT) entry is present. This can create a race >> between device attachment (after DAA) and the point where the client >> driver enables IBIs via i3c_device_enable_ibi(). >> >> Set DEV_ADDR_TABLE_SIR_REJECT in the DAT entry during >> attach_i3c_dev() and reattach_i3c_dev() so that IBIs are rejected >> by default. The bit is cleared in enable_ibi() after ENEC is issued, > > In patch, there are not clean this bit code? > The clear/restore handling is already implemented in dw_i3c_master_set_sir_enabled(), which is called from enable_ibi() and disable_ibi(). This patch only ensures SIR_REJECT is set when the DAT entry is initially programmed during attach/reattach. I will update the commit message in V2 for better clarity. >> and restored in disable_ibi() after DISEC, keeping the controller >> state aligned with the device event configuration. >> > > Fixes tags > Will add Fixes tag in V2. > Frank >> Signed-off-by: Adrian Ng Ho Yin >> --- >> drivers/i3c/master/dw-i3c-master.c | 4 ++-- >> 1 file changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c >> index 7eb09ad10171..d014f2cd6071 100644 >> --- a/drivers/i3c/master/dw-i3c-master.c >> +++ b/drivers/i3c/master/dw-i3c-master.c >> @@ -1024,7 +1024,7 @@ static int dw_i3c_master_reattach_i3c_dev(struct i3c_dev_desc *dev, >> master->free_pos &= ~BIT(pos); >> } >> >> - writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(dev->info.dyn_addr), >> + writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(dev->info.dyn_addr) | DEV_ADDR_TABLE_SIR_REJECT, >> master->regs + >> DEV_ADDR_TABLE_LOC(master->datstartaddr, data->index)); >> >> @@ -1053,7 +1053,7 @@ static int dw_i3c_master_attach_i3c_dev(struct i3c_dev_desc *dev) >> master->free_pos &= ~BIT(pos); >> i3c_dev_set_master_data(dev, data); >> >> - writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(master->devs[pos].addr), >> + writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(master->devs[pos].addr) | DEV_ADDR_TABLE_SIR_REJECT, >> master->regs + >> DEV_ADDR_TABLE_LOC(master->datstartaddr, data->index)); >> >> -- >> 2.49.GIT >> -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c