757 static void sbefifo_release_command(struct sbefifo_user *user)  in sbefifo_release_command()  argument
759 	if (is_vmalloc_addr(user->pending_cmd))  in sbefifo_release_command()
760 		vfree(user->pending_cmd);  in sbefifo_release_command()
761 	user->pending_cmd = NULL;  in sbefifo_release_command()
762 	user->pending_len = 0;  in sbefifo_release_command()
768 	struct sbefifo_user *user;  in sbefifo_user_open()  local
770 	user = kzalloc(sizeof(struct sbefifo_user), GFP_KERNEL);  in sbefifo_user_open()
771 	if (!user)  in sbefifo_user_open()
774 	file->private_data = user;  in sbefifo_user_open()
775 	user->sbefifo = sbefifo;  in sbefifo_user_open()
776 	user->cmd_page = (void *)__get_free_page(GFP_KERNEL);  in sbefifo_user_open()
777 	if (!user->cmd_page) {  in sbefifo_user_open()
778 		kfree(user);  in sbefifo_user_open()
781 	mutex_init(&user->file_lock);  in sbefifo_user_open()
789 	struct sbefifo_user *user = file->private_data;  in sbefifo_user_read()  local
796 	if (!user)  in sbefifo_user_read()
798 	sbefifo = user->sbefifo;  in sbefifo_user_read()
802 	mutex_lock(&user->file_lock);  in sbefifo_user_read()
805 	if (user->pending_len == 0) {  in sbefifo_user_read()
809 	if (user->pending_len < 8) {  in sbefifo_user_read()
813 	cmd_len = user->pending_len >> 2;  in sbefifo_user_read()
822 	rc = __sbefifo_submit(sbefifo, user->pending_cmd, cmd_len, &resp_iter);  in sbefifo_user_read()
830 	sbefifo_release_command(user);  in sbefifo_user_read()
831 	mutex_unlock(&user->file_lock);  in sbefifo_user_read()
838 	struct sbefifo_user *user = file->private_data;  in sbefifo_user_write()  local
842 	if (!user)  in sbefifo_user_write()
844 	sbefifo = user->sbefifo;  in sbefifo_user_write()
850 	mutex_lock(&user->file_lock);  in sbefifo_user_write()
854 		user->pending_cmd = user->cmd_page;  in sbefifo_user_write()
856 		user->pending_cmd = vmalloc(len);  in sbefifo_user_write()
857 	if (!user->pending_cmd) {  in sbefifo_user_write()
863 	if (copy_from_user(user->pending_cmd, buf, len)) {  in sbefifo_user_write()
869 	if (len == 4 && be32_to_cpu(*(__be32 *)user->pending_cmd) ==  in sbefifo_user_write()
873 		user->pending_len = 0;  in sbefifo_user_write()
877 		rc = sbefifo_request_reset(user->sbefifo);  in sbefifo_user_write()
885 	user->pending_len = len;  in sbefifo_user_write()
887 	if (!user->pending_len)  in sbefifo_user_write()
888 		sbefifo_release_command(user);  in sbefifo_user_write()
890 	mutex_unlock(&user->file_lock);  in sbefifo_user_write()
898 	struct sbefifo_user *user = file->private_data;  in sbefifo_user_release()  local
900 	if (!user)  in sbefifo_user_release()
903 	sbefifo_release_command(user);  in sbefifo_user_release()
904 	free_page((unsigned long)user->cmd_page);  in sbefifo_user_release()
905 	kfree(user);  in sbefifo_user_release()