From patchwork Mon Dec 20 14:34:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 12688037 X-Patchwork-Delegate: bhelgaas@google.com 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 043A9C433F5 for ; Mon, 20 Dec 2021 14:47:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236112AbhLTOrg (ORCPT ); Mon, 20 Dec 2021 09:47:36 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:38042 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236885AbhLTOpL (ORCPT ); Mon, 20 Dec 2021 09:45:11 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 14FC9611A1; Mon, 20 Dec 2021 14:45:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA160C36AE8; Mon, 20 Dec 2021 14:45:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1640011510; bh=DE+qHWkJ23uZ/MaUpspTYDDfJ6jw+rIb2osT9F9pm34=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D8lWFM8xrA+kn+T9gxI43ydiY6Iu1uLLRUjWqn2yPZXvzU0WCujKerR53f7ajtkvv E5BWwXabh3/g0uCLwmf6LokJs8VAN2OLcEyd1GL5/Nojzk7w0wwvN4hVdinOxupzXB KpWEWjy8srzwcU+3YHoMtyusTgAIOGp7kdpq+PYQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Stefan Roese , Thomas Gleixner , linux-pci@vger.kernel.org, Bjorn Helgaas , Michal Simek , Marek Vasut Subject: [PATCH 5.4 46/71] PCI/MSI: Clear PCI_MSIX_FLAGS_MASKALL on error Date: Mon, 20 Dec 2021 15:34:35 +0100 Message-Id: <20211220143027.232621207@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211220143025.683747691@linuxfoundation.org> References: <20211220143025.683747691@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Thomas Gleixner commit 94185adbfad56815c2c8401e16d81bdb74a79201 upstream. PCI_MSIX_FLAGS_MASKALL is set in the MSI-X control register at MSI-X interrupt setup time. It's cleared on success, but the error handling path only clears the PCI_MSIX_FLAGS_ENABLE bit. That's incorrect as the reset state of the PCI_MSIX_FLAGS_MASKALL bit is zero. That can be observed via lspci: Capabilities: [b0] MSI-X: Enable- Count=67 Masked+ Clear the bit in the error path to restore the reset state. Fixes: 438553958ba1 ("PCI/MSI: Enable and mask MSI-X early") Reported-by: Stefan Roese Signed-off-by: Thomas Gleixner Tested-by: Stefan Roese Cc: linux-pci@vger.kernel.org Cc: Bjorn Helgaas Cc: Michal Simek Cc: Marek Vasut Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/87tufevoqx.ffs@tglx Signed-off-by: Greg Kroah-Hartman --- drivers/pci/msi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -878,7 +878,7 @@ out_free: free_msi_irqs(dev); out_disable: - pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0); + pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL | PCI_MSIX_FLAGS_ENABLE, 0); return ret; }