[PATCH 2/2] firmware: stratix10-svc: fix bug in saving controller data

From: tien . sung . ang
Date: Mon Jun 19 2023 - 23:53:20 EST


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

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@xxxxxxxxx>
---
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 ca713f39107e..60e08987c402 100644
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -130,6 +130,7 @@ struct stratix10_svc_data {
* @complete_status: state for completion
* @invoke_fn: function to issue secure monitor call or hypervisor call
* @sdm_lock: a mutex lock to allow only one pending sdm message per client
+ * @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.
@@ -144,6 +145,7 @@ struct stratix10_svc_controller {
svc_invoke_fn *invoke_fn;
/* Enforces atomic command sending to SDM */
struct mutex *sdm_lock;
+ struct stratix10_svc *svc;
};

/**
@@ -1252,6 +1254,7 @@ 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) {
@@ -1279,8 +1282,6 @@ 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;
@@ -1296,8 +1297,8 @@ 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