Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965285Ab2B2XRY (ORCPT ); Wed, 29 Feb 2012 18:17:24 -0500 Received: from rcsinet15.oracle.com ([148.87.113.117]:26348 "EHLO rcsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932489Ab2B2XJL (ORCPT ); Wed, 29 Feb 2012 18:09:11 -0500 From: Yinghai Lu To: Jesse Barnes , Benjamin Herrenschmidt , Tony Luck , David Miller , x86 Cc: Bjorn Helgaas , Dominik Brodowski , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Yinghai Lu , Rusty Russell , Mauro Carvalho Chehab , linux-pcmcia@lists.infradead.org Subject: [PATCH 36/39] pcmcia: remove workaround for fixing pci parent bus subordinate Date: Wed, 29 Feb 2012 15:07:35 -0800 Message-Id: <1330556858-11768-37-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1330556858-11768-1-git-send-email-yinghai@kernel.org> References: <1330556858-11768-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsinet21.oracle.com [141.146.126.237] X-CT-RefId: str=0001.0A090206.4F4EAFF3.0141,ss=1,re=0.000,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4538 Lines: 115 Now pci busn allocation code is there, and it will preallocate bus number and it will make sure parent buses subordinate is right. So remove workaround here. Signed-off-by: Yinghai Lu Tested-by: Dominik Brodowski Cc: Rusty Russell Cc: Mauro Carvalho Chehab Cc: linux-pcmcia@lists.infradead.org --- drivers/pcmcia/yenta_socket.c | 75 ----------------------------------------- 1 files changed, 0 insertions(+), 75 deletions(-) diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c index 849c0c1..5757cae 100644 --- a/drivers/pcmcia/yenta_socket.c +++ b/drivers/pcmcia/yenta_socket.c @@ -1064,79 +1064,6 @@ static void yenta_config_init(struct yenta_socket *socket) config_writew(socket, CB_BRIDGE_CONTROL, bridge); } -/** - * yenta_fixup_parent_bridge - Fix subordinate bus# of the parent bridge - * @cardbus_bridge: The PCI bus which the CardBus bridge bridges to - * - * Checks if devices on the bus which the CardBus bridge bridges to would be - * invisible during PCI scans because of a misconfigured subordinate number - * of the parent brige - some BIOSes seem to be too lazy to set it right. - * Does the fixup carefully by checking how far it can go without conflicts. - * See http://bugzilla.kernel.org/show_bug.cgi?id=2944 for more information. - */ -static void yenta_fixup_parent_bridge(struct pci_bus *cardbus_bridge) -{ - struct list_head *tmp; - unsigned char upper_limit; - /* - * We only check and fix the parent bridge: All systems which need - * this fixup that have been reviewed are laptops and the only bridge - * which needed fixing was the parent bridge of the CardBus bridge: - */ - struct pci_bus *bridge_to_fix = cardbus_bridge->parent; - - /* Check bus numbers are already set up correctly: */ - if (bridge_to_fix->subordinate >= cardbus_bridge->subordinate) - return; /* The subordinate number is ok, nothing to do */ - - if (!bridge_to_fix->parent) - return; /* Root bridges are ok */ - - /* stay within the limits of the bus range of the parent: */ - upper_limit = bridge_to_fix->parent->subordinate; - - /* check the bus ranges of all silbling bridges to prevent overlap */ - list_for_each(tmp, &bridge_to_fix->parent->children) { - struct pci_bus *silbling = pci_bus_b(tmp); - /* - * If the silbling has a higher secondary bus number - * and it's secondary is equal or smaller than our - * current upper limit, set the new upper limit to - * the bus number below the silbling's range: - */ - if (silbling->secondary > bridge_to_fix->subordinate - && silbling->secondary <= upper_limit) - upper_limit = silbling->secondary - 1; - } - - /* Show that the wanted subordinate number is not possible: */ - if (cardbus_bridge->subordinate > upper_limit) - dev_printk(KERN_WARNING, &cardbus_bridge->dev, - "Upper limit for fixing this " - "bridge's parent bridge: #%02x\n", upper_limit); - - /* If we have room to increase the bridge's subordinate number, */ - if (bridge_to_fix->subordinate < upper_limit) { - - /* use the highest number of the hidden bus, within limits */ - unsigned char subordinate_to_assign = - min(cardbus_bridge->subordinate, upper_limit); - - dev_printk(KERN_INFO, &bridge_to_fix->dev, - "Raising subordinate bus# of parent " - "bus (#%02x) from #%02x to #%02x\n", - bridge_to_fix->number, - bridge_to_fix->subordinate, subordinate_to_assign); - - /* Save the new subordinate in the bus struct of the bridge */ - bridge_to_fix->subordinate = subordinate_to_assign; - - /* and update the PCI config space with the new subordinate */ - pci_write_config_byte(bridge_to_fix->self, - PCI_SUBORDINATE_BUS, bridge_to_fix->subordinate); - } -} - /* * Initialize a cardbus controller. Make sure we have a usable * interrupt, and that we can map the cardbus area. Fill in the @@ -1257,8 +1184,6 @@ static int __devinit yenta_probe(struct pci_dev *dev, const struct pci_device_id dev_printk(KERN_INFO, &dev->dev, "Socket status: %08x\n", cb_readl(socket, CB_SOCKET_STATE)); - yenta_fixup_parent_bridge(dev->subordinate); - /* Register it with the pcmcia layer.. */ ret = pcmcia_register_socket(&socket->socket); if (ret == 0) { -- 1.7.7 -- 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/