From patchwork Mon May 31 13:12:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 450926 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0D23C47082 for ; Mon, 31 May 2021 14:39:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C211561186 for ; Mon, 31 May 2021 14:39:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233609AbhEaOlc (ORCPT ); Mon, 31 May 2021 10:41:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:37958 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234144AbhEaOjb (ORCPT ); Mon, 31 May 2021 10:39:31 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0D7E761C5B; Mon, 31 May 2021 13:52:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1622469153; bh=pE2tmrkllVgxwJJQI1Mpen+neXL9uPZdNdKJWlIOvC8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Dfw/lw613KK4Mu5EAniHCIH7gLjr/jFvTJIZoDlFl27GeLbnz/TbHAnhamHAImDZD yVOGyvF0HYWcmyJ4G1GVFz8OpEYOu8na2KvMcwo85YSvB0S0TEIN0dgFw44PESXotQ IiSU/wSPp0JqB7hOWntucmm7GOIOLdApNBwpOvxU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christian Gmeiner Subject: [PATCH 5.12 088/296] serial: 8250_pci: handle FL_NOIRQ board flag Date: Mon, 31 May 2021 15:12:23 +0200 Message-Id: <20210531130706.853875433@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210531130703.762129381@linuxfoundation.org> References: <20210531130703.762129381@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Christian Gmeiner commit 9808f9be31c68af43f6e531f2c851ebb066513fe upstream. In commit 8428413b1d14 ("serial: 8250_pci: Implement MSI(-X) support") the way the irq gets allocated was changed. With that change the handling FL_NOIRQ got lost. Restore the old behaviour. Fixes: 8428413b1d14 ("serial: 8250_pci: Implement MSI(-X) support") Cc: Signed-off-by: Christian Gmeiner Link: https://lore.kernel.org/r/20210527095529.26281-1-christian.gmeiner@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_pci.c | 29 +++++++++++++++++------------ 1 file changed, 17 insertions(+), 12 deletions(-) --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -3958,21 +3958,26 @@ pciserial_init_ports(struct pci_dev *dev uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; uart.port.uartclk = board->base_baud * 16; - if (pci_match_id(pci_use_msi, dev)) { - dev_dbg(&dev->dev, "Using MSI(-X) interrupts\n"); - pci_set_master(dev); - rc = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES); + if (board->flags & FL_NOIRQ) { + uart.port.irq = 0; } else { - dev_dbg(&dev->dev, "Using legacy interrupts\n"); - rc = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_LEGACY); - } - if (rc < 0) { - kfree(priv); - priv = ERR_PTR(rc); - goto err_deinit; + if (pci_match_id(pci_use_msi, dev)) { + dev_dbg(&dev->dev, "Using MSI(-X) interrupts\n"); + pci_set_master(dev); + rc = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES); + } else { + dev_dbg(&dev->dev, "Using legacy interrupts\n"); + rc = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_LEGACY); + } + if (rc < 0) { + kfree(priv); + priv = ERR_PTR(rc); + goto err_deinit; + } + + uart.port.irq = pci_irq_vector(dev, 0); } - uart.port.irq = pci_irq_vector(dev, 0); uart.port.dev = &dev->dev; for (i = 0; i < nr_ports; i++) {