From patchwork Wed Dec 15 17:19:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 12696317 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2E170C433EF for ; Wed, 15 Dec 2021 17:21:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:References :In-Reply-To:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=qgktRabv6hEdX5q3EhE4NhoBUhYsyevh+p9gSvVkE7M=; b=iDXBy7ztFvN9yU eJfoJ7boHWZfzNwq1Abh0Eo62pRfMU+tqEKkQHOjTwOhxurUdqKzWPs7KZnQ8KXMdhTp1+P8B3ZZE Fzq+fYVPbkO8QQTTxcohypvRoWU8d+iD+Zw3LxUkur5UwE5qYY7IkF8zRjw88DG19KiGoKh4XftxW 8H3JzEKjT9v6WgxOUoyrvhEsXNx7sofEGefi3kV/Htchocqu1c6PQxEVz3Cdc+lvRlfpO15TupJFx O3Q+zy7e5rnYWppPz89Opc090wQDGfJkH11kJMlKkF1kc7ZSL8xBT/g3ey6/B7WPilhzWx3p/b/0D b/T/E8AyF6EeTw/5op3w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mxXwc-0022nx-2m; Wed, 15 Dec 2021 17:19:59 +0000 Received: from galois.linutronix.de ([2a0a:51c0:0:12e:550::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mxXwX-0022lf-GH for linux-arm-kernel@lists.infradead.org; Wed, 15 Dec 2021 17:19:55 +0000 From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1639588790; 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: in-reply-to:in-reply-to:references:references; bh=8dWZtEdF7LamMiNHDQtUJa+ux0BuM6MSUIqH9b+Hvyo=; b=wYhmWV2tAzCQfd9US7tK/sDWCnBbJEkh0toY9VDuwtDZ0a56PMo8BoccPtbLPELWo9I28H HKc2neisW5z7nVF58H33hQ6I3JpDjp7x8Kvp/cCgjUvnYD8QdYGH61A1BeXSEXOYr4fYH5 DLBlYKQg7bDxik0O85eEeU6t0YgTJ460cdP5T6mA0DAEz4t2jvbnSoMRyHmCdRIsX+WU5+ q/5iZYQod3bSNBGwjqvNjip+w8Kzgei0iFMPfqmZqeU25htKL5R6ykYiRwqQfnG6lFz+mQ r3FvWyI39vnZ4v4UgiVkKOdpkffYfcVyqNIiIF+3PGfZRf0ksOR9s1/A7ZSHGA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1639588790; 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: in-reply-to:in-reply-to:references:references; bh=8dWZtEdF7LamMiNHDQtUJa+ux0BuM6MSUIqH9b+Hvyo=; b=lk+vW3OXeYaf8seyWIaOrmuYBvQZ09fZDnlpC9df3JMNaqJ74ZUxSByXPFwmhYxR0MLbL9 iLeRWTRdVJiovHBA== To: LKML Cc: Bjorn Helgaas , Marc Zygnier , Alex Williamson , Kevin Tian , Jason Gunthorpe , Megha Dey , Ashok Raj , linux-pci@vger.kernel.org, Cedric Le Goater , Greg Kroah-Hartman , Bjorn Helgaas , Juergen Gross , xen-devel@lists.xenproject.org, Arnd Bergmann , Michael Ellerman , Benjamin Herrenschmidt , linuxppc-dev@lists.ozlabs.org, Stuart Yoder , Laurentiu Tudor , Nishanth Menon , Tero Kristo , Santosh Shilimkar , linux-arm-kernel@lists.infradead.org, Vinod Koul , dmaengine@vger.kernel.org, Mark Rutland , Will Deacon , Robin Murphy , Joerg Roedel , iommu@lists.linux-foundation.org, Jassi Brar , Peter Ujfalusi , Sinan Kaya Subject: [patch V4 09-02/35] PCI/MSI: Allocate MSI device data on first use In-Reply-To: <87tuf9rdoj.ffs@tglx> References: <20211210221642.869015045@linutronix.de> <20211210221813.740644351@linutronix.de> <87tuf9rdoj.ffs@tglx> Date: Wed, 15 Dec 2021 18:19:49 +0100 Message-ID: <87r1adrdje.ffs@tglx> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211215_091953_721708_2F4C64BF X-CRM114-Status: GOOD ( 11.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Allocate MSI device data on first use, i.e. when a PCI driver invokes one of the PCI/MSI enablement functions. Add a wrapper function to ensure that the ordering vs. pcim_msi_release() is correct. Signed-off-by: Thomas Gleixner Reviewed-by: Greg Kroah-Hartman --- V4: Adopted to ensure devres ordering --- drivers/pci/msi/msi.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -366,6 +366,19 @@ static int pcim_setup_msi_release(struct return ret; } +/* + * Ordering vs. devres: msi device data has to be installed first so that + * pcim_msi_release() is invoked before it on device release. + */ +static int pci_setup_msi_context(struct pci_dev *dev) +{ + int ret = msi_setup_device_data(&dev->dev); + + if (!ret) + ret = pcim_setup_msi_release(dev); + return ret; +} + static struct msi_desc * msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd) { @@ -909,7 +922,7 @@ static int __pci_enable_msi_range(struct if (nvec > maxvec) nvec = maxvec; - rc = pcim_setup_msi_release(dev); + rc = pci_setup_msi_context(dev); if (rc) return rc; @@ -956,7 +969,7 @@ static int __pci_enable_msix_range(struc if (WARN_ON_ONCE(dev->msix_enabled)) return -EINVAL; - rc = pcim_setup_msi_release(dev); + rc = pci_setup_msi_context(dev); if (rc) return rc;