From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martin Wilck Subject: SIOCGIFMAP silently broken? Date: Mon, 31 Jan 2005 15:57:09 +0100 Message-ID: <41FE4745.4020003@fujitsu-siemens.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: To: linux-kernel@vger.kernel.org, netdev@oss.sgi.com Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Hi, we are using a server management software that uses the irq information returned by the SIOCGIFMAP ioctl to correlate network interfaces with LAN hardware. The code for SIOCGIFMAP if net/core/dev.c simply returns netdev->irq which isn't set by most actual LAN drivers any more, and it seems to be common opinion that setting netdev->irq is either optional or even wrong (http://www.ussg.iu.edu/hypermail/linux/kernel/0407.3/1292.html). Consequently, the SIOCGIFMAP ioctl reports bogus IRQ values for most hardware; it is therefore unreliable. Would it be possible to fix the ioctl such that it returns the correct irq value, e.g. be using the irq field of the associated struct pci_dev? If not, I'd consider it better to deprecate netdev->irq officially and always return bogus so that people stop using it. In both cases, the netdev->irq field isn't used anymore; perhaps it should be officially deprecated and/or removed? Regards Martin -- Martin Wilck Phone: +49 5251 8 15113 Fujitsu Siemens Computers Fax: +49 5251 8 20409 Heinz-Nixdorf-Ring 1 mailto:Martin.Wilck@Fujitsu-Siemens.com D-33106 Paderborn http://www.fujitsu-siemens.com/primergy