From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp04.au.ibm.com (e23smtp04.au.ibm.com [202.81.31.146]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id E50D31A0290 for ; Tue, 10 Feb 2015 11:37:25 +1100 (AEDT) Received: from /spool/local by e23smtp04.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 10 Feb 2015 10:37:24 +1000 Received: from d23relay06.au.ibm.com (d23relay06.au.ibm.com [9.185.63.219]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id A758A2BB0047 for ; Tue, 10 Feb 2015 11:37:21 +1100 (EST) Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay06.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t1A0bDqZ17956916 for ; Tue, 10 Feb 2015 11:37:21 +1100 Received: from d23av02.au.ibm.com (localhost [127.0.0.1]) by d23av02.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t1A0amXX014110 for ; Tue, 10 Feb 2015 11:36:48 +1100 Message-ID: <1423528584.4924.70.camel@au1.ibm.com> Subject: Re: [PATCH V11 07/17] powerpc/pci: Don't unset pci resources for VFs From: Benjamin Herrenschmidt To: Wei Yang Date: Tue, 10 Feb 2015 11:36:24 +1100 In-Reply-To: <1421288887-7765-8-git-send-email-weiyang@linux.vnet.ibm.com> References: <20150113180502.GC2776@google.com> <1421288887-7765-1-git-send-email-weiyang@linux.vnet.ibm.com> <1421288887-7765-8-git-send-email-weiyang@linux.vnet.ibm.com> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Cc: bhelgaas@google.com, linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, gwshan@linux.vnet.ibm.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Thu, 2015-01-15 at 10:27 +0800, Wei Yang wrote: > If we're going to reassign resources with flag PCI_REASSIGN_ALL_RSRC, all > resources will be cleaned out during device header fixup time and then get > reassigned by PCI core. However, the VF resources won't be reassigned and > thus, we shouldn't clean them out. > > This patch adds a condition. If the pci_dev is a VF, skip the resource > unset process. I don't understand this, can you elaborate ? Why wouldn't we reassign the IOV resource just like everything else ? Ben. > 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 37d512d..889f743 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;