This is a note to let you know that I've just added the patch titled
habanalabs: Call put_pid() when releasing control device
to the 5.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
habanalabs-call-put_pid-when-releasing-control-devic.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bcfc1480c49d6eb278a85e942dde4364b4c92ede
Author: Tomer Tayar <ttayar@xxxxxxxxx>
Date: Fri Feb 19 14:05:33 2021 +0200
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@xxxxxxxxx>
Reviewed-by: Oded Gabbay <ogabbay@xxxxxxxxxx>
Signed-off-by: Oded Gabbay <ogabbay@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index 69d04eca767f..6785329eee27 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -117,6 +117,8 @@ 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;
