From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:55470 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728081AbeIXSQp (ORCPT ); Mon, 24 Sep 2018 14:16:45 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nicholas Mc Guire , Sasha Levin Subject: [PATCH 4.14 049/173] staging: bcm2835-camera: fix timeout handling in wait_for_completion_timeout Date: Mon, 24 Sep 2018 13:51:23 +0200 Message-Id: <20180924113119.604497011@linuxfoundation.org> In-Reply-To: <20180924113114.334025954@linuxfoundation.org> References: <20180924113114.334025954@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nicholas Mc Guire [ Upstream commit b7afce51d95726a619743aaad8870db66dfa1479 ] wait_for_completion_timeout returns unsigned long not int so a variable of proper type is introduced. Further the check for <= 0 is ambiguous and should be == 0 here indicating timeout which is the only error case so no additional check needed here. Signed-off-by: Nicholas Mc Guire Fixes: 7b3ad5abf027 ("staging: Import the BCM2835 MMAL-based V4L2 camera driver.") Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) --- a/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c +++ b/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c @@ -834,6 +834,7 @@ static int send_synchronous_mmal_msg(str { struct mmal_msg_context *msg_context; int ret; + unsigned long timeout; /* payload size must not cause message to exceed max size */ if (payload_len > @@ -872,11 +873,11 @@ static int send_synchronous_mmal_msg(str return ret; } - ret = wait_for_completion_timeout(&msg_context->u.sync.cmplt, 3 * HZ); - if (ret <= 0) { - pr_err("error %d waiting for sync completion\n", ret); - if (ret == 0) - ret = -ETIME; + timeout = wait_for_completion_timeout(&msg_context->u.sync.cmplt, + 3 * HZ); + if (timeout == 0) { + pr_err("timed out waiting for sync completion\n"); + ret = -ETIME; /* todo: what happens if the message arrives after aborting */ release_msg_context(msg_context); return ret;