From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753948AbaFJTsw (ORCPT ); Tue, 10 Jun 2014 15:48:52 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:35048 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753211AbaFJTst (ORCPT ); Tue, 10 Jun 2014 15:48:49 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Alexander Usyskin , Tomas Winkler , Greg Kroah-Hartman , Kamal Mostafa Subject: [PATCH 3.13 021/160] mei: ignore client writing state during cb completion Date: Tue, 10 Jun 2014 12:44:21 -0700 Message-Id: <1402429600-20477-22-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1402429600-20477-1-git-send-email-kamal@canonical.com> References: <1402429600-20477-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.13.11.3 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Alexander Usyskin commit 34ec43661fe8f1977dd0f05353302ae2ed10aabb upstream. Ignore client writing state during cb completion to fix a memory leak. When moving cbs to the completion list we should not look at writing_state as this state can be already overwritten by next write, the fact that a cb is on the write waiting list means that it was already written to the HW and we can safely complete it. Same pays for wait in poll handler, we do not have to check the state wake is done after completion list processing. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman Signed-off-by: Kamal Mostafa --- drivers/misc/mei/interrupt.c | 3 +-- drivers/misc/mei/main.c | 3 +-- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 6ce63f5..f061cf0 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -424,8 +424,7 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) cl->status = 0; list_del(&cb->list); - if (MEI_WRITING == cl->writing_state && - cb->fop_type == MEI_FOP_WRITE && + if (cb->fop_type == MEI_FOP_WRITE && cl != &dev->iamthif_cl) { cl_dbg(dev, cl, "MEI WRITE COMPLETE\n"); cl->writing_state = MEI_WRITE_COMPLETE; diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 9661a81..56c8205 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -653,8 +653,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait) goto out; } - if (MEI_WRITE_COMPLETE == cl->writing_state) - mask |= (POLLIN | POLLRDNORM); + mask |= (POLLIN | POLLRDNORM); out: mutex_unlock(&dev->device_lock); -- 1.9.1