759 static void sbefifo_release_command(struct sbefifo_user *user)  in sbefifo_release_command()  argument
761 	if (is_vmalloc_addr(user->pending_cmd))  in sbefifo_release_command()
762 		vfree(user->pending_cmd);  in sbefifo_release_command()
763 	user->pending_cmd = NULL;  in sbefifo_release_command()
764 	user->pending_len = 0;  in sbefifo_release_command()
770 	struct sbefifo_user *user;  in sbefifo_user_open()  local
772 	user = kzalloc(sizeof(struct sbefifo_user), GFP_KERNEL);  in sbefifo_user_open()
773 	if (!user)  in sbefifo_user_open()
776 	file->private_data = user;  in sbefifo_user_open()
777 	user->sbefifo = sbefifo;  in sbefifo_user_open()
778 	user->cmd_page = (void *)__get_free_page(GFP_KERNEL);  in sbefifo_user_open()
779 	if (!user->cmd_page) {  in sbefifo_user_open()
780 		kfree(user);  in sbefifo_user_open()
783 	mutex_init(&user->file_lock);  in sbefifo_user_open()
791 	struct sbefifo_user *user = file->private_data;  in sbefifo_user_read()  local
798 	if (!user)  in sbefifo_user_read()
800 	sbefifo = user->sbefifo;  in sbefifo_user_read()
804 	mutex_lock(&user->file_lock);  in sbefifo_user_read()
807 	if (user->pending_len == 0) {  in sbefifo_user_read()
811 	if (user->pending_len < 8) {  in sbefifo_user_read()
815 	cmd_len = user->pending_len >> 2;  in sbefifo_user_read()
824 	rc = __sbefifo_submit(sbefifo, user->pending_cmd, cmd_len, &resp_iter);  in sbefifo_user_read()
832 	sbefifo_release_command(user);  in sbefifo_user_read()
833 	mutex_unlock(&user->file_lock);  in sbefifo_user_read()
840 	struct sbefifo_user *user = file->private_data;  in sbefifo_user_write()  local
844 	if (!user)  in sbefifo_user_write()
846 	sbefifo = user->sbefifo;  in sbefifo_user_write()
852 	mutex_lock(&user->file_lock);  in sbefifo_user_write()
856 		user->pending_cmd = user->cmd_page;  in sbefifo_user_write()
858 		user->pending_cmd = vmalloc(len);  in sbefifo_user_write()
859 	if (!user->pending_cmd) {  in sbefifo_user_write()
865 	if (copy_from_user(user->pending_cmd, buf, len)) {  in sbefifo_user_write()
871 	if (len == 4 && be32_to_cpu(*(__be32 *)user->pending_cmd) ==  in sbefifo_user_write()
875 		user->pending_len = 0;  in sbefifo_user_write()
879 		rc = sbefifo_request_reset(user->sbefifo);  in sbefifo_user_write()
887 	user->pending_len = len;  in sbefifo_user_write()
889 	if (!user->pending_len)  in sbefifo_user_write()
890 		sbefifo_release_command(user);  in sbefifo_user_write()
892 	mutex_unlock(&user->file_lock);  in sbefifo_user_write()
900 	struct sbefifo_user *user = file->private_data;  in sbefifo_user_release()  local
902 	if (!user)  in sbefifo_user_release()
905 	sbefifo_release_command(user);  in sbefifo_user_release()
906 	free_page((unsigned long)user->cmd_page);  in sbefifo_user_release()
907 	kfree(user);  in sbefifo_user_release()