[PATCH v5 15/25] soundwire: amd: defer dev_set_drvdata() until after INIT_WORK()

[Vijendar Mukunda <Vijendar.Mukunda@amd.com>]

amd_sdw_manager_probe() called dev_set_drvdata() before initialising
the amd_sdw_irq_thread and amd_sdw_work structures with INIT_WORK().
An interrupt arriving in that window could call the IRQ handler which
enqueues amd_sdw_irq_thread before the work struct is initialised,
leading to undefined behaviour.

Move dev_set_drvdata() to after both INIT_WORK() calls to close the
race window.

Fixes: 65f93e4096a0 ("soundwire: amd: add SoundWire manager interrupt handling")
Reported-by: Lee Jones <lee@kernel.org>
Closes: https://sashiko.dev/#/bug/linux-9890e8dc-4b7d-44d3-bfb0-171dc421e28c
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
---
 drivers/soundwire/amd_manager.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
index 4083a3f0ec2f..df2fdff18d3d 100644
--- a/drivers/soundwire/amd_manager.c
+++ b/drivers/soundwire/amd_manager.c
@@ -1266,9 +1266,9 @@ static int amd_sdw_manager_probe(struct platform_device *pdev)
 		sdw_bus_master_delete(&amd_manager->bus);
 		return ret;
 	}
-	dev_set_drvdata(dev, amd_manager);
 	INIT_WORK(&amd_manager->amd_sdw_irq_thread, amd_sdw_irq_thread);
 	INIT_WORK(&amd_manager->amd_sdw_work, amd_sdw_update_slave_status_work);
+	dev_set_drvdata(dev, amd_manager);
 	return 0;
 }
 
-- 
2.53.0