Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752468AbaBJKWC (ORCPT ); Mon, 10 Feb 2014 05:22:02 -0500 Received: from cantor2.suse.de ([195.135.220.15]:46239 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751725AbaBJKWA (ORCPT ); Mon, 10 Feb 2014 05:22:00 -0500 Message-ID: <1392027718.2082.11.camel@linux-fkkt.site> Subject: Re: [PATCH part1 v5 3/7] PCI: Add support for Device Serial Number capability From: Oliver Neukum To: Yijing Wang Cc: Bjorn Helgaas , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Hanjun Guo , Paul Bolle , "RafaelJ.Wysocki" , Gu Zheng Date: Mon, 10 Feb 2014 11:21:58 +0100 In-Reply-To: <1392005051-54508-4-git-send-email-wangyijing@huawei.com> References: <1392005051-54508-1-git-send-email-wangyijing@huawei.com> <1392005051-54508-4-git-send-email-wangyijing@huawei.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2014-02-10 at 12:04 +0800, Yijing Wang wrote: > +static u64 pci_device_serial_number(struct pci_bus *bus, int devfn) > +{ > + int pos; > + u32 lo, hi; > + > + if (!pci_bus_find_capability(bus, devfn, PCI_CAP_ID_EXP)) > + return 0; > + > + pos = pci_bus_find_ext_capability(bus, devfn, > PCI_EXT_CAP_ID_DSN); > + if (!pos) > + return 0; > + > + pci_bus_read_config_dword(bus, devfn, pos + 4, &lo); > + pci_bus_read_config_dword(bus, devfn, pos + 8, &hi); We have no macro for that? > + return ((u64)hi << 32) | lo; > +} Regards Oliver -- 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/