Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756843Ab1F2Oar (ORCPT ); Wed, 29 Jun 2011 10:30:47 -0400 Received: from p3plsmtps2ded02.prod.phx3.secureserver.net ([208.109.80.59]:51106 "HELO p3plsmtps2ded02-02.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1755793Ab1F2OWx (ORCPT ); Wed, 29 Jun 2011 10:22:53 -0400 From: "K. Y. Srinivasan" To: gregkh@suse.de, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, virtualization@lists.osdl.org Cc: "K. Y. Srinivasan" , Haiyang Zhang , Abhishek Kane , Hank Janssen Subject: [PATCH 06/40] Staging: hv: vmbus: Introduce a lock to protect the ext field in hv_device Date: Wed, 29 Jun 2011 07:39:03 -0700 Message-Id: <1309358377-8537-6-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1309358377-8537-1-git-send-email-kys@microsoft.com> References: <1309358301-8488-1-git-send-email-kys@microsoft.com> <1309358377-8537-1-git-send-email-kys@microsoft.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1536 Lines: 46 The current mechanism for handling references in broken. Introduce a lock to protect the ext field in hv_device. Signed-off-by: K. Y. Srinivasan Signed-off-by: Haiyang Zhang Signed-off-by: Abhishek Kane Signed-off-by: Hank Janssen --- drivers/staging/hv/hyperv.h | 3 +++ drivers/staging/hv/vmbus_drv.c | 1 + 2 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/staging/hv/hyperv.h b/drivers/staging/hv/hyperv.h index 370b096..ff3c69d 100644 --- a/drivers/staging/hv/hyperv.h +++ b/drivers/staging/hv/hyperv.h @@ -830,6 +830,9 @@ struct hv_device { struct vmbus_channel *channel; + /* This lock protects the device extension field */ + spinlock_t ext_lock; + /* Device extension; */ void *ext; }; diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c index 2e6bfc1..903362e 100644 --- a/drivers/staging/hv/vmbus_drv.c +++ b/drivers/staging/hv/vmbus_drv.c @@ -557,6 +557,7 @@ struct hv_device *vmbus_child_device_create(struct hv_guid *type, return NULL; } + spin_lock_init(&child_device_obj->ext_lock); child_device_obj->channel = channel; /* * Get the human readable device type name and stash it away. -- 1.7.4.1 -- 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/