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Fri, 10 Mar 2023 19:24:26 -0600 From: Tanmay Shah To: , , , , , CC: , , , Tanmay Shah Subject: [PATCH v5 1/5] mailbox: zynqmp: fix counts of child nodes Date: Fri, 10 Mar 2023 17:24:04 -0800 Message-ID: <20230311012407.1292118-2-tanmay.shah@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230311012407.1292118-1-tanmay.shah@amd.com> References: <20230311012407.1292118-1-tanmay.shah@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT114:EE_|CH3PR12MB8353:EE_ X-MS-Office365-Filtering-Correlation-Id: 81debf0d-7d45-43e9-532b-08db21cf5ba6 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:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(4636009)(346002)(396003)(136003)(376002)(39860400002)(451199018)(36840700001)(46966006)(40470700004)(44832011)(15650500001)(5660300002)(26005)(2906002)(8936002)(36756003)(4326008)(70206006)(70586007)(8676002)(316002)(110136005)(1076003)(356005)(41300700001)(40480700001)(6636002)(86362001)(478600001)(54906003)(40460700003)(6666004)(36860700001)(81166007)(82740400003)(336012)(186003)(2616005)(426003)(82310400005)(83380400001)(47076005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Mar 2023 01:24:28.1849 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 81debf0d-7d45-43e9-532b-08db21cf5ba6 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT114.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8353 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org If child mailbox node status is disabled it causes crash in interrupt handler. Fix this by assigning only available child node during driver probe. Fixes: 4981b82ba2ff ("mailbox: ZynqMP IPI mailbox controller") Signed-off-by: Tanmay Shah Acked-by: Michal Simek --- Changes in v5: - mailbox node count should not be 0 for driver to probe drivers/mailbox/zynqmp-ipi-mailbox.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/mailbox/zynqmp-ipi-mailbox.c b/drivers/mailbox/zynqmp-ipi-mailbox.c index a4c8d23c76e2..ae47fbac38d2 100644 --- a/drivers/mailbox/zynqmp-ipi-mailbox.c +++ b/drivers/mailbox/zynqmp-ipi-mailbox.c @@ -634,7 +634,12 @@ static int zynqmp_ipi_probe(struct platform_device *pdev) struct zynqmp_ipi_mbox *mbox; int num_mboxes, ret = -EINVAL; - num_mboxes = of_get_child_count(np); + num_mboxes = of_get_available_child_count(np); + if (num_mboxes == 0) { + dev_err(dev, "mailbox nodes not available\n"); + return -EINVAL; + } + pdata = devm_kzalloc(dev, struct_size(pdata, ipi_mboxes, num_mboxes), GFP_KERNEL); if (!pdata)