From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7A6AC433F5 for ; Sat, 27 Nov 2021 01:26:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347085AbhK0B3S (ORCPT ); Fri, 26 Nov 2021 20:29:18 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:36550 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241986AbhK0B1L (ORCPT ); Fri, 26 Nov 2021 20:27:11 -0500 Message-ID: <20211126230524.112845775@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1637976082; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=PN3ExRN1k42hfHq1uj98iHzkfSIuhUpOYD8o8PLDemE=; b=CP7AHsOeiCofaClIDYfrrlr4ZTfikHYL6L+ePsfOVaLzvytVt8rxY5MS2fPxkXF0pCPMSg BnYJd1fFxGCEvG6PkcG0aaC/fFYhs2iDYr85FcfFnW8XtwWWEERMEXzDiBETVkF5AZ/U16 3JVuF9tMf0N4ygmYCI2PA1ziqVEG6BzwXOYPkHIQuZSHwFxnwhVgL1RmeMnS4FT+Pe5XXU zaI0cY/XgwfdI5/QOvFWZctgE+QQxxMB6QQ0b5xbpqwpYQyf5V88D826ehqDVfoPAZOMm9 Oz2XWg7JmLe9HitCjTM7NdSqn03HqCSv02KSGxQ5w3MtFO0vccWWmdMKJepS7A== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1637976082; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=PN3ExRN1k42hfHq1uj98iHzkfSIuhUpOYD8o8PLDemE=; b=MYTkd4TwNrAcWOX8VX/1sMslLnKJgzGhqYjt4CXqo1X6rPga6taXu0j+zxWW/MnHG6jTAA P7EBHuieujIYm2Ag== From: Thomas Gleixner To: LKML Cc: Bjorn Helgaas , Marc Zygnier , Alex Williamson , Kevin Tian , Jason Gunthorpe , Megha Dey , Ashok Raj , linux-pci@vger.kernel.org, Greg Kroah-Hartman , Santosh Shilimkar , iommu@lists.linux-foundation.org, dmaengine@vger.kernel.org, Stuart Yoder , Laurentiu Tudor , Nishanth Menon , Tero Kristo , linux-arm-kernel@lists.infradead.org, x86@kernel.org, Vinod Koul , Mark Rutland , Will Deacon , Sinan Kaya Subject: [patch 03/37] PCI/MSI: Allocate MSI device data on first use References: <20211126224100.303046749@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Date: Sat, 27 Nov 2021 02:21:22 +0100 (CET) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Message-ID: <20211127012122.kMvwI0ehvn2K7Z-OT0bAwDxXorKKGTLGjMNEboydwCs@z> Allocate MSI device data on first use, i.e. when a PCI driver invokes one of the PCI/MSI enablement functions. Signed-off-by: Thomas Gleixner --- drivers/pci/msi/msi.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -889,10 +889,12 @@ static int __pci_enable_msi_range(struct /* deprecated, don't use */ int pci_enable_msi(struct pci_dev *dev) { - int rc = __pci_enable_msi_range(dev, 1, 1, NULL); - if (rc < 0) - return rc; - return 0; + int rc = msi_setup_device_data(&dev->dev); + + if (!rc) + rc = __pci_enable_msi_range(dev, 1, 1, NULL); + + return rc < 0 ? rc : 0; } EXPORT_SYMBOL(pci_enable_msi); @@ -947,7 +949,11 @@ static int __pci_enable_msix_range(struc int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, int minvec, int maxvec) { - return __pci_enable_msix_range(dev, entries, minvec, maxvec, NULL, 0); + int ret = msi_setup_device_data(&dev->dev); + + if (!ret) + ret = __pci_enable_msix_range(dev, entries, minvec, maxvec, NULL, 0); + return ret; } EXPORT_SYMBOL(pci_enable_msix_range); @@ -974,8 +980,12 @@ int pci_alloc_irq_vectors_affinity(struc struct irq_affinity *affd) { struct irq_affinity msi_default_affd = {0}; + int ret = msi_setup_device_data(&dev->dev); int nvecs = -ENOSPC; + if (ret) + return ret; + if (flags & PCI_IRQ_AFFINITY) { if (!affd) affd = &msi_default_affd;