Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760343AbYFIWvo (ORCPT ); Mon, 9 Jun 2008 18:51:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752166AbYFIWvg (ORCPT ); Mon, 9 Jun 2008 18:51:36 -0400 Received: from ozlabs.org ([203.10.76.45]:60342 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751523AbYFIWvf (ORCPT ); Mon, 9 Jun 2008 18:51:35 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <18509.44672.668946.207110@cargo.ozlabs.ibm.com> Date: Tue, 10 Jun 2008 08:28:16 +1000 From: Paul Mackerras To: Stefan Roscher Cc: Roland Dreier , "OF-EWG" , general@lists.openfabrics.org, "LinuxPPC-Dev" , LKML , TKLEIN@de.ibm.com, fenkes@de.ibm.com, raisch@de.ibm.com, THEMANN@de.ibm.com Subject: Re: [PATCH 0/2] Prevent loss of interrupts in IB/ehca In-Reply-To: <200806091742.29421.ossrosch@linux.vnet.ibm.com> References: <200806091742.29421.ossrosch@linux.vnet.ibm.com> X-Mailer: VM 7.19 under Emacs 22.1.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 747 Lines: 19 Stefan Roscher writes: > This patchset contains two changes for IB/ehca and ibmebus. > > The first patch enables ibmebus_request_irq() to optionally return the > IRQ number, which is used by the second patch to trigger EOI in case of > lost interrupts. At first sight it seems like a very bad idea for a driver to be poking into the internals of the interrupt subsystem like this. Under what circumstances do interrupts get lost, and why does doing an extra EOI like this fix the problem? Paul. -- 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/