linux-kernel - [PATCH] remoteproc: k3-r5: Fix error handling when power-up failed

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Message-ID: <9f481156-f220-4adf-b3d9-670871351e26@siemens.com>
Date: Mon, 19 Aug 2024 17:24:51 +0200
From: Jan Kiszka <jan.kiszka@...mens.com>
To: Bjorn Andersson <andersson@...nel.org>,
 Mathieu Poirier <mathieu.poirier@...aro.org>,
 linux-remoteproc@...r.kernel.org
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
 Apurva Nandan <a-nandan@...com>, Beleswar Padhi <b-padhi@...com>,
 "stable@...r.kernel.org" <stable@...r.kernel.org>, Nishanth Menon <nm@...com>
Subject: [PATCH] remoteproc: k3-r5: Fix error handling when power-up failed

From: Jan Kiszka <jan.kiszka@...mens.com>

By simply bailing out, the driver was violating its rule and internal
assumptions that either both or no rproc should be initialized. E.g.,
this could cause the first core to be available but not the second one,
leading to crashes on its shutdown later on while trying to dereference
that second instance.

Fixes: 61f6f68447ab ("remoteproc: k3-r5: Wait for core0 power-up before powering up core1")
Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
---
 drivers/remoteproc/ti_k3_r5_remoteproc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c
index 39a47540c590..eb09d2e9b32a 100644
--- a/drivers/remoteproc/ti_k3_r5_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c
@@ -1332,7 +1332,7 @@ static int k3_r5_cluster_rproc_init(struct platform_device *pdev)
 			dev_err(dev,
 				"Timed out waiting for %s core to power up!\n",
 				rproc->name);
-			return ret;
+			goto err_powerup;
 		}
 	}
 
@@ -1348,6 +1348,7 @@ static int k3_r5_cluster_rproc_init(struct platform_device *pdev)
 		}
 	}
 
+err_powerup:
 	rproc_del(rproc);
 err_add:
 	k3_r5_reserved_mem_exit(kproc);
-- 
2.43.0