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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Tomer Tayar <ttayar@habana.ai>,
        Oded Gabbay <ogabbay@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.10 036/221] habanalabs: Call put_pid() when releasing control device
Date:   Mon, 29 Mar 2021 09:56:07 +0200
Message-Id: <20210329075630.374152190@linuxfoundation.org>
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From: Tomer Tayar <ttayar@habana.ai>

[ 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>
---
 drivers/misc/habanalabs/common/device.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index 71b3a4d5adc6..7b0bf470795c 100644
--- 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;
-- 
2.30.1