linux-kernel - [PATCH v2 1/1] firmware: stratix10-svc: fix bug in saving controller data

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Message-ID: <b28ba544224536391e3e7e2c1aac9c31b5b01216.1761740742.git.khairul.anuar.romli@altera.com>
Date: Wed, 29 Oct 2025 20:31:21 +0800
From: Khairul Anuar Romli <khairul.anuar.romli@...era.com>
To: Dinh Nguyen <dinguyen@...nel.org>,
	linux-kernel@...r.kernel.org,
	Ang Tien Sung <tiensung.ang@...era.com>,
	Khairul Anuar Romli <khairul.anuar.romli@...era.com>
Subject: [PATCH v2 1/1] firmware: stratix10-svc: fix bug in saving controller data

Fix the incorrect usage of platform_set_drvdata and dev_set_drvdata. They
both are of the same data and overrides each other. This resulted in the
rmmod of the svc driver to fail and throw a kernel panic for kthread_stop
and fifo free.

Fixes: bf0e5bf68a20 ("firmware: stratix10-svc: extend svc to support new RSU features")
cc: stable@...r.kernel.org # 6.6+
Signed-off-by: Ang Tien Sung <tiensung.ang@...era.com>
Signed-off-by: Khairul Anuar Romli <khairul.anuar.romli@...era.com>
---
Changes in v2:
	- Add CC that was missed in the v1 and original patch from 2023
---
 drivers/firmware/stratix10-svc.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
index 3acfa067c5dd..41f53d1e9d91 100644
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -256,6 +256,7 @@ struct stratix10_async_ctrl {
  * @svc_fifo_lock: protect access to service message data queue
  * @invoke_fn: function to issue secure monitor call or hypervisor call
  * @actrl: async control structure
+ * @svc: manages the list of client svc drivers
  *
  * This struct is used to create communication channels for service clients, to
  * handle secure monitor or hypervisor call.
@@ -273,6 +274,7 @@ struct stratix10_svc_controller {
 	spinlock_t svc_fifo_lock;
 	svc_invoke_fn *invoke_fn;
 	struct stratix10_async_ctrl actrl;
+	struct stratix10_svc *svc;
 };
 
 /**
@@ -1950,6 +1952,7 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
 		ret = -ENOMEM;
 		goto err_free_kfifo;
 	}
+	controller->svc = svc;
 
 	svc->stratix10_svc_rsu = platform_device_alloc(STRATIX10_RSU, 0);
 	if (!svc->stratix10_svc_rsu) {
@@ -1981,8 +1984,6 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_unregister_fcs_dev;
 
-	dev_set_drvdata(dev, svc);
-
 	pr_info("Intel Service Layer Driver Initialized\n");
 
 	return 0;
@@ -2002,8 +2003,8 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
 
 static void stratix10_svc_drv_remove(struct platform_device *pdev)
 {
-	struct stratix10_svc *svc = dev_get_drvdata(&pdev->dev);
 	struct stratix10_svc_controller *ctrl = platform_get_drvdata(pdev);
+	struct stratix10_svc *svc = ctrl->svc;
 
 	stratix10_svc_async_exit(ctrl);
 
-- 
2.43.7