From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753161Ab2KIHbl (ORCPT ); Fri, 9 Nov 2012 02:31:41 -0500 Received: from mail-pb0-f46.google.com ([209.85.160.46]:43730 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751918Ab2KIHbh (ORCPT ); Fri, 9 Nov 2012 02:31:37 -0500 Message-ID: <1352446287.27977.2.camel@phoenix> Subject: [PATCH] misc: apds9802als: Fix checking timeout in als_wait_for_data_ready() From: Axel Lin To: Greg Kroah-Hartman Cc: Anantha Narayanan , Alan Cox , Arnd Bergmann , linux-kernel@vger.kernel.org Date: Fri, 09 Nov 2012 15:31:27 +0800 Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In the case of timeout waiting for data ready, the retry variable is -1. This also fixes a bug: current code returns -ETIMEDOUT if latest retry success ( which means retry is 0 when exiting the while loop ). Signed-off-by: Axel Lin --- drivers/misc/apds9802als.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/apds9802als.c b/drivers/misc/apds9802als.c index 0314773..94923d2 100644 --- a/drivers/misc/apds9802als.c +++ b/drivers/misc/apds9802als.c @@ -68,7 +68,7 @@ static int als_wait_for_data_ready(struct device *dev) ret = i2c_smbus_read_byte_data(client, 0x86); } while (!(ret & 0x80) && retry--); - if (!retry) { + if (retry < 0) { dev_warn(dev, "timeout waiting for data ready\n"); return -ETIMEDOUT; } -- 1.7.9.5