From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936468AbaFIJ1w (ORCPT ); Mon, 9 Jun 2014 05:27:52 -0400 Received: from ip4-83-240-18-248.cust.nbox.cz ([83.240.18.248]:59137 "EHLO ip4-83-240-18-248.cust.nbox.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932462AbaFIJ1m (ORCPT ); Mon, 9 Jun 2014 05:27:42 -0400 From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Olof Johansson , Doug Anderson , Wolfram Sang , Jiri Slaby Subject: [PATCH 3.12 132/146] i2c: s3c2410: resume race fix Date: Mon, 9 Jun 2014 10:51:07 +0200 Message-Id: X-Mailer: git-send-email 1.9.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Olof Johansson 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit ce78cc071f5f541480e381cc0241d37590041a9d upstream. Don't unmark the device as suspended until after it's been re-setup. The main race would be w.r.t. an i2c driver that gets resumed at the same time (asyncronously), that is allowed to do a transfer since suspended is set to 0 before reinit, but really should have seen the -EIO return instead. Signed-off-by: Olof Johansson Signed-off-by: Doug Anderson Acked-by: Kukjin Kim Signed-off-by: Wolfram Sang Signed-off-by: Jiri Slaby --- drivers/i2c/busses/i2c-s3c2410.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c index 3747b9bf67d6..f7d572363f6c 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -1200,10 +1200,10 @@ static int s3c24xx_i2c_resume(struct device *dev) struct platform_device *pdev = to_platform_device(dev); struct s3c24xx_i2c *i2c = platform_get_drvdata(pdev); - i2c->suspended = 0; clk_prepare_enable(i2c->clk); s3c24xx_i2c_init(i2c); clk_disable_unprepare(i2c->clk); + i2c->suspended = 0; return 0; } -- 1.9.3