[PATCH 3/4] accel/rocket: Fix the extra iommu_group_get call in rocket_job_handle_irq

[Chaoyi Chen <kernel@airkyi.com>]

From: Chaoyi Chen <chaoyi.chen@rock-chips.com>

The rocket attaches the IOMMU group in rocket_job_run() and detaches it
in rocket_job_handle_irq(). Calling  iommu_group_get() in
rocket_job_handle_irq() causes the reference count to increase
unexpectedly. And this causes rocket_core_fini() to fail to release the
IOMMU group, leading to a resource leak.

Fixes: 658ebeac3351 ("accel/rocket: Add IOCTL for BO creation")
Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
---
 drivers/accel/rocket/rocket_job.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/accel/rocket/rocket_job.c b/drivers/accel/rocket/rocket_job.c
index 2f1861f960cc..db10848926d8 100644
--- a/drivers/accel/rocket/rocket_job.c
+++ b/drivers/accel/rocket/rocket_job.c
@@ -340,7 +340,7 @@ static void rocket_job_handle_irq(struct rocket_core *core)
 				return;
 			}
 
-			iommu_detach_group(NULL, iommu_group_get(core->dev));
+			iommu_detach_group(NULL, core->iommu_group);
 			dma_fence_signal(core->in_flight_job->done_fence);
 			pm_runtime_put_autosuspend(core->dev);
 			core->in_flight_job = NULL;
-- 
2.53.0