From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758171AbcEFJqh (ORCPT ); Fri, 6 May 2016 05:46:37 -0400 Received: from mail-pa0-f50.google.com ([209.85.220.50]:36543 "EHLO mail-pa0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751522AbcEFJqf (ORCPT ); Fri, 6 May 2016 05:46:35 -0400 From: Pramod Gurav To: gregkh@linuxfoundation.org, jslaby@suse.com Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, Pramod Gurav Subject: [PATCH] serial_core: Change UART PM state to OFF on failure Date: Fri, 6 May 2016 15:16:23 +0530 Message-Id: <1462527983-32108-1-git-send-email-pramod.gurav@linaro.org> X-Mailer: git-send-email 1.8.2.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org uart_change_pm is used to turn on the UART controller resources and change UART's PM status. On failure to allocate pages the controller be left in ON state. This will change the state to OFF on failure. Signed-off-by: Pramod Gurav --- drivers/tty/serial/serial_core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 62fe368..58af2e9 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -156,9 +156,10 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state, if (!state->xmit.buf) { /* This is protected by the per port mutex */ page = get_zeroed_page(GFP_KERNEL); - if (!page) + if (!page) { + uart_change_pm(state, UART_PM_STATE_OFF); return -ENOMEM; - + } state->xmit.buf = (unsigned char *) page; uart_circ_clear(&state->xmit); } -- 1.8.2.1