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 EB8CAC433FE for ; Mon, 20 Dec 2021 14:47:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236185AbhLTOru (ORCPT ); Mon, 20 Dec 2021 09:47:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32898 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237016AbhLTOpT (ORCPT ); Mon, 20 Dec 2021 09:45:19 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5066AC061377; Mon, 20 Dec 2021 06:43:23 -0800 (PST) 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 ams.source.kernel.org (Postfix) with ESMTPS id 0E504B80EDF; Mon, 20 Dec 2021 14:43:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 40D62C36AE9; Mon, 20 Dec 2021 14:43:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1640011400; bh=u1Vlw4GkYZr3nZ3nYhnbENhD8m7I7UNV/8kI6p8XFHA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=d+37dWo6Wl/GWOIo6gYMYS9IwtNkNZiRgI/dv9rD6+uw6hWFDOqCX/dil/asyphKo xoC8vhJfkf4AJKFiUY06xs2AMK66aaeuBMfJiQSWN3yHNd/rVE2uYgm5eCFglTe1pB bWgS3faMVX51IgLqRmuvpPxqjRvWhq2GvLJYLskg= 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 4.19 32/56] PCI/MSI: Clear PCI_MSIX_FLAGS_MASKALL on error Date: Mon, 20 Dec 2021 15:34:25 +0100 Message-Id: <20211220143024.496764056@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20211220143023.451982183@linuxfoundation.org> References: <20211220143023.451982183@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 @@ -850,7 +850,7 @@ 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; }