habanalabs: Call put_pid() when releasing control device

[ Upstream commit 27ac5aada024e0821c86540ad18f37edadd77d5e ]

The refcount of the "hl_fpriv" structure is not used for the control
device, and thus hl_hpriv_put() is not called when releasing this
device.
This results with no call to put_pid(), so add it explicitly in
hl_device_release_ctrl().

Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index 71b3a4d..7b0bf47 100644 (file)
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -106,6 +106,8 @@ static int hl_device_release_ctrl(struct inode *inode, struct file *filp)
        list_del(&hpriv->dev_node);
        mutex_unlock(&hdev->fpriv_list_lock);
 
+       put_pid(hpriv->taskpid);
+
        kfree(hpriv);
 
        return 0;