habanalabs: kill user process after CS rollback

This patch calls the kill user process function after we rollback the
in-flight CSs. This is because the user process can't be closed while
there are open CSs. Therefore, there is no point of sending it a SIGKILL
before we do the rollback CS part.
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/habanalabs/device.c

@@ -630,8 +630,6 @@ static void device_hard_reset_pending(struct work_struct *work)
 		container_of(work, struct hl_device_reset_work, reset_work);
 	struct hl_device *hdev = device_reset_work->hdev;
 
-	device_kill_open_processes(hdev);
-
 	hl_device_reset(hdev, true, true);
 
 	kfree(device_reset_work);
@@ -736,6 +734,13 @@ int hl_device_reset(struct hl_device *hdev, bool hard_reset,
 	/* Go over all the queues, release all CS and their jobs */
 	hl_cs_rollback_all(hdev);
 
+	/* Kill processes here after CS rollback. This is because the process
+	 * can't really exit until all its CSs are done, which is what we
+	 * do in cs rollback
+	 */
+	if (from_hard_reset_thread)
+		device_kill_open_processes(hdev);
+
 	/* Release kernel context */
 	if ((hard_reset) && (hl_ctx_put(hdev->kernel_ctx) == 1))
 		hdev->kernel_ctx = NULL;
@@ -1129,8 +1134,6 @@ void hl_device_fini(struct hl_device *hdev)
 
 	hdev->hard_reset_pending = true;
 
-	device_kill_open_processes(hdev);
-
 	hl_hwmon_fini(hdev);
 
 	device_late_fini(hdev);
@@ -1149,6 +1152,12 @@ void hl_device_fini(struct hl_device *hdev)
 	/* Go over all the queues, release all CS and their jobs */
 	hl_cs_rollback_all(hdev);
 
+	/* Kill processes here after CS rollback. This is because the process
+	 * can't really exit until all its CSs are done, which is what we
+	 * do in cs rollback
+	 */
+	device_kill_open_processes(hdev);
+
 	hl_cb_pool_fini(hdev);
 
 	/* Release kernel context */