Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755508AbZLVXFE (ORCPT ); Tue, 22 Dec 2009 18:05:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755411AbZLVXDw (ORCPT ); Tue, 22 Dec 2009 18:03:52 -0500 Received: from sca-es-mail-2.Sun.COM ([192.18.43.133]:56875 "EHLO sca-es-mail-2.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755334AbZLVXDq (ORCPT ); Tue, 22 Dec 2009 18:03:46 -0500 MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: TEXT/PLAIN Date: Tue, 22 Dec 2009 15:02:27 -0800 From: Yinghai Lu Subject: [PATCH 07/14] pci: don't shrink bridge resources In-reply-to: <1261522954-12591-1-git-send-email-yinghai@kernel.org> To: Jesse Barnes , Ingo Molnar , Linus Torvalds , Ivan Kokshaysky , Kenji Kaneshige , Alex Chiang , Bjorn Helgaas Cc: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Yinghai Lu Message-id: <1261522954-12591-8-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.6.0.2 References: <1261522954-12591-1-git-send-email-yinghai@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2436 Lines: 72 when we are clearing leaf bridge resource and try to get big one, we could shrink the bridge if there is no resource under it. let check with old resource size and make sure we are trying to get big one. -v2: keep disable window print out, still could happen on non pci hotplug system Signed-off-by: Yinghai Lu --- drivers/pci/setup-bus.c | 14 ++++++++++++-- 1 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 9bb4435..d53b42e 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -387,7 +387,7 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size) { struct pci_dev *dev; struct resource *b_res = find_free_bus_resource(bus, IORESOURCE_IO); - unsigned long size = 0, size1 = 0; + unsigned long size = 0, size1 = 0, old_size; if (!b_res) return; @@ -412,12 +412,17 @@ static void pbus_size_io(struct pci_bus *bus, resource_size_t min_size) } if (size < min_size) size = min_size; + old_size = resource_size(b_res); + if (old_size == 1) + old_size = 0; /* To be fixed in 2.5: we should have sort of HAVE_ISA flag in the struct pci_bus. */ #if defined(CONFIG_ISA) || defined(CONFIG_EISA) size = (size & 0xff) + ((size & ~0xffUL) << 2); #endif size = ALIGN(size + size1, 4096); + if (size < old_size) + size = old_size; if (!size) { if (b_res->start || b_res->end) dev_info(&bus->self->dev, "disabling bridge window " @@ -438,7 +443,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask, unsigned long type, resource_size_t min_size) { struct pci_dev *dev; - resource_size_t min_align, align, size; + resource_size_t min_align, align, size, old_size; resource_size_t aligns[12]; /* Alignments from 1Mb to 2Gb */ int order, max_order; struct resource *b_res = find_free_bus_resource(bus, type); @@ -488,6 +493,11 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask, } if (size < min_size) size = min_size; + old_size = resource_size(b_res); + if (old_size == 1) + old_size = 0; + if (size < old_size) + size = old_size; align = 0; min_align = 0; -- 1.6.0.2 -- 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/