Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755495Ab2JRKEJ (ORCPT ); Thu, 18 Oct 2012 06:04:09 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:15884 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755470Ab2JRKEG (ORCPT ); Thu, 18 Oct 2012 06:04:06 -0400 X-IronPort-AV: E=Sophos;i="4.80,606,1344211200"; d="scan'208";a="211697518" From: David Vrabel To: xen-devel@lists.xen.org CC: "David Vrabel" , Konrad Rzeszutek Wilk , linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, Florian Tobias Schandinat Subject: [PATCH 4/5] xen-fbfront: handle backend CLOSED without CLOSING Date: Thu, 18 Oct 2012 11:03:37 +0100 Message-ID: <1350554618-14582-4-git-send-email-david.vrabel@citrix.com> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <507FD39F.4060601@citrix.com> References: <507FD39F.4060601@citrix.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1568 Lines: 48 From: David Vrabel Backend drivers shouldn't transistion to CLOSED unless the frontend is CLOSED. If a backend does transition to CLOSED too soon then the frontend may not see the CLOSING state and will not properly shutdown. So, treat an unexpected backend CLOSED state the same as CLOSING. Signed-off-by: David Vrabel Acked-by: Konrad Rzeszutek Wilk --- Cc: linux-fbdev@vger.kernel.org Cc: Florian Tobias Schandinat --- drivers/video/xen-fbfront.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-) diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c index b7f5173..917bb56 100644 --- a/drivers/video/xen-fbfront.c +++ b/drivers/video/xen-fbfront.c @@ -641,7 +641,6 @@ static void xenfb_backend_changed(struct xenbus_device *dev, case XenbusStateReconfiguring: case XenbusStateReconfigured: case XenbusStateUnknown: - case XenbusStateClosed: break; case XenbusStateInitWait: @@ -670,6 +669,10 @@ InitWait: info->feature_resize = val; break; + case XenbusStateClosed: + if (dev->state == XenbusStateClosed) + break; + /* Missed the backend's CLOSING state -- fallthrough */ case XenbusStateClosing: xenbus_frontend_closed(dev); break; -- 1.7.2.5 -- 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/