Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759063Ab0G3RWy (ORCPT ); Fri, 30 Jul 2010 13:22:54 -0400 Received: from kroah.org ([198.145.64.141]:52342 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758927Ab0G3RUd (ORCPT ); Fri, 30 Jul 2010 13:20:33 -0400 X-Mailbox-Line: From gregkh@clark.site Fri Jul 30 10:15:14 2010 Message-Id: <20100730171514.104320686@clark.site> User-Agent: quilt/0.48-11.2 Date: Fri, 30 Jul 2010 10:16:28 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Alan Jenkins , Corentin Chary , Tim Gardner Subject: [160/165] eeepc-laptop: check wireless hotplug events In-Reply-To: <20100730171550.GA1299@kroah.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2372 Lines: 71 2.6.32-stable review patch. If anyone has any objections, please let us know. ------------------ From: Alan Jenkins commit bc9d24a3aeb1532fc3e234907a8b6d671f7ed68f upstream. Before we mark the wireless device as unplugged, check PCI config space to see whether the wireless device is really disabled (and vice versa). This works around newer models which don't want the hotplug code, where we end up disabling the wired network device. My old 701 still works correctly with this. I can also simulate an afflicted model by changing the hardcoded PCI bus/slot number in the driver, and it seems to work nicely (although it is a bit noisy). In future this type of hotplug support will be implemented by the PCI core. The existing blacklist and the new warning message will be removed at that point. Signed-off-by: Alan Jenkins Signed-off-by: Corentin Chary Cc: Tim Gardner Signed-off-by: Greg Kroah-Hartman --- drivers/platform/x86/eeepc-laptop.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) --- a/drivers/platform/x86/eeepc-laptop.c +++ b/drivers/platform/x86/eeepc-laptop.c @@ -752,6 +752,8 @@ static void eeepc_rfkill_hotplug(void) struct pci_dev *dev; struct pci_bus *bus; bool blocked = eeepc_wlan_rfkill_blocked(); + bool absent; + u32 l; if (ehotk->wlan_rfkill) rfkill_set_sw_state(ehotk->wlan_rfkill, blocked); @@ -765,6 +767,22 @@ static void eeepc_rfkill_hotplug(void) goto out_unlock; } + if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { + pr_err("Unable to read PCI config space?\n"); + goto out_unlock; + } + absent = (l == 0xffffffff); + + if (blocked != absent) { + pr_warning("BIOS says wireless lan is %s, " + "but the pci device is %s\n", + blocked ? "blocked" : "unblocked", + absent ? "absent" : "present"); + pr_warning("skipped wireless hotplug as probably " + "inappropriate for this model\n"); + goto out_unlock; + } + if (!blocked) { dev = pci_get_slot(bus, 0); if (dev) { -- 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/