Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932980AbaFCMCA (ORCPT ); Tue, 3 Jun 2014 08:02:00 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:43596 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932678AbaFCLlp (ORCPT ); Tue, 3 Jun 2014 07:41:45 -0400 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Olof Johansson , Doug Anderson , Wolfram Sang , Luis Henriques Subject: [PATCH 3.11 076/138] i2c: s3c2410: resume race fix Date: Tue, 3 Jun 2014 12:38:42 +0100 Message-Id: <1401795584-22664-77-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1401795584-22664-1-git-send-email-luis.henriques@canonical.com> References: <1401795584-22664-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.11 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.11.10.11 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Olof Johansson 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: Luis Henriques --- 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 cab1c91b75a3..a72aad9561b0 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -1204,10 +1204,10 @@ 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; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/