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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260208-imx-rproc-fix-v1-1-ad74555eb9a4@nxp.com> X-B4-Tracking: v=1; b=H4sIANpziGkC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIzMDIwML3czcCt2igqL8ZN20zApdCxPjlBRDA2PDJNMkJaCegqJUoDDYvOj Y2loAQQfy+F8AAAA= X-Change-ID: 20260208-imx-rproc-fix-843dd1031b5b To: Bjorn Andersson , Mathieu Poirier , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Daniel Baluta Cc: linux-remoteproc@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Peng Fan , Dan Carpenter X-Mailer: b4 0.14.2 X-ClientProxiedBy: SI1PR02CA0023.apcprd02.prod.outlook.com (2603:1096:4:1f4::19) To PAXPR04MB8459.eurprd04.prod.outlook.com (2603:10a6:102:1da::15) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAXPR04MB8459:EE_|DB8PR04MB7036:EE_ X-MS-Office365-Filtering-Correlation-Id: 24c5735e-d911-4ef7-4f02-08de6705484b X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|19092799006|52116014|7416014|376014|366016|38350700014; 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When of_reserved_mem_region_to_resource() fails, imx_rproc_prepare() returns immediately, so the platform-specific prepare callback is never called. As a result, prepare_ops such as imx_rproc_sm_lmm_prepare() on i.MX95 have no chance to run. This is problematic when Linux controls the M7 Logical Machine and is responsible for preparing resources such as TCM. Without running the platform prepare callback, loading the M7 ELF into TCM may fail if the bootloader did not power up and initialize TCM. Fix this by breaking out of the reserved-memory loop instead of returning, allowing the platform prepare_ops to be executed as intended. Fixes: edd2a9956055 ("remoteproc: imx_rproc: Introduce prepare ops for imx_= rproc_dcfg") Reported-by: Dan Carpenter Closes: https://lore.kernel.org/linux-remoteproc/aYYXAa2Fj36XG4yQ@p14s/T/#t Signed-off-by: Peng Fan --- drivers/remoteproc/imx_rproc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c index f5f916d6790519360f446f063e09d018c5654953..8c8ddbf995a46b01627d15a2eb3= da0b72eee6285 100644 --- a/drivers/remoteproc/imx_rproc.c +++ b/drivers/remoteproc/imx_rproc.c @@ -617,7 +617,7 @@ static int imx_rproc_prepare(struct rproc *rproc) =20 err =3D of_reserved_mem_region_to_resource(np, i++, &res); if (err) - return 0; + break; =20 /* * Ignore the first memory region which will be used vdev buffer. --- base-commit: 9845cf73f7db6094c0d8419d6adb848028f4a921 change-id: 20260208-imx-rproc-fix-843dd1031b5b Best regards, --=20 Peng Fan