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Peter Anvin" , Thomas Gleixner , Ingo Molnar , Mario Limonciello Subject: [PATCH v4 1/4] rtc: mc146818-lib: Adjust failure return code for mc146818_get_time() Date: Mon, 27 Nov 2023 23:36:50 -0600 Message-ID: <20231128053653.101798-2-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231128053653.101798-1-mario.limonciello@amd.com> References: <20231128053653.101798-1-mario.limonciello@amd.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF000042A7:EE_|SJ2PR12MB8953:EE_ X-MS-Office365-Filtering-Correlation-Id: 71eb3626-0c07-4b2a-e696-08dbf020d53b 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:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230031)(4636009)(136003)(376002)(39860400002)(346002)(396003)(230922051799003)(64100799003)(451199024)(186009)(1800799012)(82310400011)(40470700004)(46966006)(36840700001)(6666004)(8936002)(8676002)(4326008)(7696005)(54906003)(70586007)(70206006)(316002)(110136005)(40460700003)(478600001)(81166007)(47076005)(356005)(36756003)(41300700001)(1076003)(86362001)(26005)(16526019)(36860700001)(44832011)(2616005)(40480700001)(2906002)(83380400001)(336012)(426003)(66574015)(7416002)(82740400003)(5660300002)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Nov 2023 14:46:40.8587 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 71eb3626-0c07-4b2a-e696-08dbf020d53b X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000042A7.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8953 mc146818_get_time() calls mc146818_avoid_UIP() to avoid fetching the time while RTC update is in progress (UIP). When this fails, the return code is -EIO, but actually there was no IO failure. The reason for the return from mc146818_avoid_UIP() is that the UIP wasn't cleared in the time period. Adjust the return code to -ETIMEDOUT to match the behavior. Tested-by: Mateusz Jończyk Reviewed-by: Mateusz Jończyk Acked-by: Mateusz Jończyk Cc: stable@vger.kernel.org Fixes: 2a61b0ac5493 ("rtc: mc146818-lib: refactor mc146818_get_time") Signed-off-by: Mario Limonciello --- v2->v3: * Add tags v1->v2: * Add stable and fixes tag --- drivers/rtc/rtc-mc146818-lib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/rtc/rtc-mc146818-lib.c b/drivers/rtc/rtc-mc146818-lib.c index f1c09f1db044..43a28e82674e 100644 --- a/drivers/rtc/rtc-mc146818-lib.c +++ b/drivers/rtc/rtc-mc146818-lib.c @@ -138,7 +138,7 @@ int mc146818_get_time(struct rtc_time *time) if (!mc146818_avoid_UIP(mc146818_get_time_callback, &p)) { memset(time, 0, sizeof(*time)); - return -EIO; + return -ETIMEDOUT; } if (!(p.ctrl & RTC_DM_BINARY) || RTC_ALWAYS_BCD)