31 	struct vmcp_session *session;  in vmcp_open()  local
36 	session = kmalloc(sizeof(*session), GFP_KERNEL);  in vmcp_open()
37 	if (!session)  in vmcp_open()
40 	session->bufsize = PAGE_SIZE;  in vmcp_open()
41 	session->response = NULL;  in vmcp_open()
42 	session->resp_size = 0;  in vmcp_open()
43 	mutex_init(&session->mutex);  in vmcp_open()
44 	file->private_data = session;  in vmcp_open()
50 	struct vmcp_session *session;  in vmcp_release()  local
52 	session = file->private_data;  in vmcp_release()
54 	free_pages((unsigned long)session->response, get_order(session->bufsize));  in vmcp_release()
55 	kfree(session);  in vmcp_release()
64 	struct vmcp_session *session;  in vmcp_read()  local
66 	session = file->private_data;  in vmcp_read()
67 	if (mutex_lock_interruptible(&session->mutex))  in vmcp_read()
69 	if (!session->response) {  in vmcp_read()
70 		mutex_unlock(&session->mutex);  in vmcp_read()
73 	size = min_t(size_t, session->resp_size, session->bufsize);  in vmcp_read()
75 					session->response, size);  in vmcp_read()
77 	mutex_unlock(&session->mutex);  in vmcp_read()
87 	struct vmcp_session *session;  in vmcp_write()  local
99 	session = file->private_data;  in vmcp_write()
100 	if (mutex_lock_interruptible(&session->mutex)) {  in vmcp_write()
104 	if (!session->response)  in vmcp_write()
105 		session->response = (char *)__get_free_pages(GFP_KERNEL  in vmcp_write()
107 						get_order(session->bufsize));  in vmcp_write()
108 	if (!session->response) {  in vmcp_write()
109 		mutex_unlock(&session->mutex);  in vmcp_write()
114 	session->resp_size = cpcmd(cmd, session->response, session->bufsize,  in vmcp_write()
115 				   &session->resp_code);  in vmcp_write()
116 	mutex_unlock(&session->mutex);  in vmcp_write()
137 	struct vmcp_session *session;  in vmcp_ioctl()  local
141 	session = file->private_data;  in vmcp_ioctl()
146 	if (mutex_lock_interruptible(&session->mutex))  in vmcp_ioctl()
150 		temp = session->resp_code;  in vmcp_ioctl()
151 		mutex_unlock(&session->mutex);  in vmcp_ioctl()
154 		free_pages((unsigned long)session->response,  in vmcp_ioctl()
155 				get_order(session->bufsize));  in vmcp_ioctl()
156 		session->response=NULL;  in vmcp_ioctl()
157 		temp = get_user(session->bufsize, argp);  in vmcp_ioctl()
158 		if (get_order(session->bufsize) > 8) {  in vmcp_ioctl()
159 			session->bufsize = PAGE_SIZE;  in vmcp_ioctl()
162 		mutex_unlock(&session->mutex);  in vmcp_ioctl()
165 		temp = session->resp_size;  in vmcp_ioctl()
166 		mutex_unlock(&session->mutex);  in vmcp_ioctl()
169 		mutex_unlock(&session->mutex);  in vmcp_ioctl()