From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp06.au.ibm.com ([202.81.31.148]:53606 "EHLO e23smtp06.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752276AbbCYI3f (ORCPT ); Wed, 25 Mar 2015 04:29:35 -0400 Received: from /spool/local by e23smtp06.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 25 Mar 2015 18:29:33 +1000 Received: from d23relay09.au.ibm.com (d23relay09.au.ibm.com [9.185.63.181]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id 97A0E3578048 for ; Wed, 25 Mar 2015 19:29:31 +1100 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay09.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t2P8TNX842926202 for ; Wed, 25 Mar 2015 19:29:31 +1100 Received: from d23av01.au.ibm.com (localhost [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t2P8SvAx025568 for ; Wed, 25 Mar 2015 19:28:58 +1100 From: Wei Yang To: bhelgaas@google.com, benh@au1.ibm.com, gwshan@linux.vnet.ibm.com Cc: linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Wei Yang Subject: [PATCH V16 12/20] powerpc/pci: Don't unset PCI resources for VFs Date: Wed, 25 Mar 2015 16:23:53 +0800 Message-Id: <1427271841-28749-13-git-send-email-weiyang@linux.vnet.ibm.com> In-Reply-To: <1427271841-28749-1-git-send-email-weiyang@linux.vnet.ibm.com> References: <1427271841-28749-1-git-send-email-weiyang@linux.vnet.ibm.com> Sender: linux-pci-owner@vger.kernel.org List-ID: Flag PCI_REASSIGN_ALL_RSRC is used to ignore resources information setup by firmware, so that kernel would re-assign all resources of pci devices. On powerpc arch, this happens in a header fixup function pcibios_fixup_resources(), which will clean up the resources if this flag is set. This works fine for PFs, since after clean up, kernel will re-assign the resources in pcibios_resource_survey(). Below is a simple call flow on how it works: pcibios_init pcibios_scan_phb pci_scan_child_bus ... pci_device_add pci_fixup_device(pci_fixup_header) pcibios_fixup_resources # header fixup for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) dev->resource[i].start = 0 pcibios_resource_survey # re-assign pcibios_allocate_resources However, the VF resources won't be re-assigned, since the VF resources are completely determined by the PF resources, and the PF resources have already been reassigned. This means we need to leave VF's resources un-cleared in pcibios_fixup_resources(). In this patch, we skip the resource unset process in pcibios_fixup_resources(), if the pci_dev is a VF. Signed-off-by: Wei Yang --- arch/powerpc/kernel/pci-common.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 2a525c9..8203101 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -788,6 +788,10 @@ static void pcibios_fixup_resources(struct pci_dev *dev) pci_name(dev)); return; } + + if (dev->is_virtfn) + return; + for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { struct resource *res = dev->resource + i; struct pci_bus_region reg; -- 1.7.9.5