Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422909AbXEDKEd (ORCPT ); Fri, 4 May 2007 06:04:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422910AbXEDKEd (ORCPT ); Fri, 4 May 2007 06:04:33 -0400 Received: from wx-out-0506.google.com ([66.249.82.237]:18732 "EHLO wx-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422909AbXEDKEc (ORCPT ); Fri, 4 May 2007 06:04:32 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:mime-version:content-type:content-transfer-encoding:content-disposition; b=EG4CuDwZbafmDu+qgkL4s7C0ubFpY8YX53oi7fMldKgYj9AD9p/8JMSRuANvLIy31ImUlidGise5OKYvc7JIO5QV0uI3+c0ZmDu94x2mgXbVhPkt5xyRLCbKDIKCVJgfUAWaXmDQLP1RX9HSrHcCi+4p39dC+u9q0M6IyJ2kExk= Message-ID: <6278d2220705040304n6bfe14e8h7d3a1302315f36a5@mail.gmail.com> Date: Fri, 4 May 2007 11:04:31 +0100 From: "Daniel J Blueman" To: "Chris Adams" Subject: Re: ExpressCard hotswap support? Cc: "Linux Kernel" MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1445 Lines: 31 On 4 May, 01:20, Chris Adams wrote: > I've got a Thinkpad Z60m with an ExpressCard slot, and I got a Belkin > F5U250 GigE ExpressCard (Marvell 88E8053 chip using sky2 driver). It > appears that Linux only recognizes it if I insert the card with the > system powered off. If I hot-insert the card, nothing happens (no > messages logged, no PCI device shows up, nothing). The BIOS initialises and powers up the downstream PCI express port when it detects a card is present. When Linux boots, it enumerates the bus and sees it, but does not do prior configuration to enable, configure and cause link negotiation on all PCI express ports I believe; this requires chipset and (sometimes revision-) specific code, which wouldn't be so robust as the BIOS doing the footwork. I have the same problem on my Sony VGN-SZ240. The problem would be addressed if the BIOS powered up all PCI express ports, but then this would draw more power. Perhaps if just needs to do the hotplug configuration correctly, but then older OSs may have problems? > Does Linux support hotswapping ExpressCards? > > This is with Fedora Core 6 with all updates, kernel 2.6.20-1.2948.fc6. -- Daniel J Blueman - 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/