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

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Message-Id: <20230623041219.1865239-2-tien.sung.ang@intel.com>
Date:   Fri, 23 Jun 2023 12:12:19 +0800
From:   tien.sung.ang@...el.com
To:     Dinh Nguyen <dinguyen@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Ang Tien Sung <tien.sung.ang@...el.com>
Subject: [PATCH 1/1] firmware: stratix10-svc: fix bug in saving controller data

From: Ang Tien Sung <tien.sung.ang@...el.com>

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.

Signed-off-by: Ang Tien Sung <tien.sung.ang@...el.com>
---
 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 80f4e2d14e04..cb72e52bd681 100644
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -133,6 +133,7 @@ struct stratix10_svc_data {
  * @complete_status: state for completion
  * @svc_fifo_lock: protect access to service message data queue
  * @invoke_fn: function to issue secure monitor call or hypervisor call
+ * @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.
@@ -149,6 +150,7 @@ struct stratix10_svc_controller {
 	struct completion complete_status;
 	spinlock_t svc_fifo_lock;
 	svc_invoke_fn *invoke_fn;
+	struct stratix10_svc *svc;
 };
 
 /**
@@ -1191,6 +1193,7 @@ 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) {
@@ -1218,8 +1221,6 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
 		goto err_unregister_dev;
 	}
 
-	dev_set_drvdata(dev, svc);
-
 	pr_info("Intel Service Layer Driver Initialized\n");
 
 	return 0;
@@ -1235,8 +1236,8 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
 
 static int 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;
 
 	platform_device_unregister(svc->intel_svc_fcs);
 	platform_device_unregister(svc->stratix10_svc_rsu);
-- 
2.25.1