From patchwork Tue Sep 1 15:10:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 264782 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=-10.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY,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 40C30C433E7 for ; Tue, 1 Sep 2020 15:25:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1C86020FC3 for ; Tue, 1 Sep 2020 15:25:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973909; bh=da5mPe30nUcNOQoq1fIwPodXLiDIbUHj0tXBSloG9us=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Zgvx5+2pIMLXz1WWzpq7x2qryC4/zLwEPeWfqCbXvuuCqNOXcEx2jIrtKSYx4lDvz nHoO4XFfg58r7gz1Rj5in5ugyc64ZwioyVZw6WoPOY7n34YLDnHXmFioCYnrO40c3b 7PxSWhD9jWjVLsTFgYJTxZsgjPoezjzNy4fTCfBQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729986AbgIAPZH (ORCPT ); Tue, 1 Sep 2020 11:25:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:49270 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729305AbgIAPZF (ORCPT ); Tue, 1 Sep 2020 11:25:05 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 656032137B; Tue, 1 Sep 2020 15:25:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598973904; bh=da5mPe30nUcNOQoq1fIwPodXLiDIbUHj0tXBSloG9us=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H10mamebhSHwk0hKEgNxPjzc4XxsgpJOg3W45fa2SjXs+GV7PfIOiFRWCnzqty9tm VZ3CPyGX2XaQi89P7PxMTEVEhSPfdZ6nSJ+jE2m1TIoMAZjYzcXdXvr0UKPtWflQ8r /RveOJXckB8Cay+XcqHVHT3F8dS1E42WAoZDmc1c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Valmer Huhn Subject: [PATCH 4.19 092/125] serial: 8250_exar: Fix number of ports for Commtech PCIe cards Date: Tue, 1 Sep 2020 17:10:47 +0200 Message-Id: <20200901150939.097722773@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901150934.576210879@linuxfoundation.org> References: <20200901150934.576210879@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Valmer Huhn commit c6b9e95dde7b54e6a53c47241201ab5a4035c320 upstream. The following in 8250_exar.c line 589 is used to determine the number of ports for each Exar board: nr_ports = board->num_ports ? board->num_ports : pcidev->device & 0x0f; If the number of ports a card has is not explicitly specified, it defaults to the rightmost 4 bits of the PCI device ID. This is prone to error since not all PCI device IDs contain a number which corresponds to the number of ports that card provides. This particular case involves COMMTECH_4222PCIE, COMMTECH_4224PCIE and COMMTECH_4228PCIE cards with device IDs 0x0022, 0x0020 and 0x0021. Currently the multiport cards receive 2, 0 and 1 port instead of 2, 4 and 8 ports respectively. To fix this, each Commtech Fastcom PCIe card is given a struct where the number of ports is explicitly specified. This ensures 'board->num_ports' is used instead of the default 'pcidev->device & 0x0f'. Fixes: d0aeaa83f0b0 ("serial: exar: split out the exar code from 8250_pci") Signed-off-by: Valmer Huhn Tested-by: Valmer Huhn Cc: stable Link: https://lore.kernel.org/r/20200813165255.GC345440@icarus.concurrent-rt.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_exar.c | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) --- a/drivers/tty/serial/8250/8250_exar.c +++ b/drivers/tty/serial/8250/8250_exar.c @@ -638,6 +638,24 @@ static const struct exar8250_board pbn_e .exit = pci_xr17v35x_exit, }; +static const struct exar8250_board pbn_fastcom35x_2 = { + .num_ports = 2, + .setup = pci_xr17v35x_setup, + .exit = pci_xr17v35x_exit, +}; + +static const struct exar8250_board pbn_fastcom35x_4 = { + .num_ports = 4, + .setup = pci_xr17v35x_setup, + .exit = pci_xr17v35x_exit, +}; + +static const struct exar8250_board pbn_fastcom35x_8 = { + .num_ports = 8, + .setup = pci_xr17v35x_setup, + .exit = pci_xr17v35x_exit, +}; + static const struct exar8250_board pbn_exar_XR17V4358 = { .num_ports = 12, .setup = pci_xr17v35x_setup, @@ -708,9 +726,9 @@ static const struct pci_device_id exar_p EXAR_DEVICE(EXAR, EXAR_XR17V358, pbn_exar_XR17V35x), EXAR_DEVICE(EXAR, EXAR_XR17V4358, pbn_exar_XR17V4358), EXAR_DEVICE(EXAR, EXAR_XR17V8358, pbn_exar_XR17V8358), - EXAR_DEVICE(COMMTECH, COMMTECH_4222PCIE, pbn_exar_XR17V35x), - EXAR_DEVICE(COMMTECH, COMMTECH_4224PCIE, pbn_exar_XR17V35x), - EXAR_DEVICE(COMMTECH, COMMTECH_4228PCIE, pbn_exar_XR17V35x), + EXAR_DEVICE(COMMTECH, COMMTECH_4222PCIE, pbn_fastcom35x_2), + EXAR_DEVICE(COMMTECH, COMMTECH_4224PCIE, pbn_fastcom35x_4), + EXAR_DEVICE(COMMTECH, COMMTECH_4228PCIE, pbn_fastcom35x_8), EXAR_DEVICE(COMMTECH, COMMTECH_4222PCI335, pbn_fastcom335_2), EXAR_DEVICE(COMMTECH, COMMTECH_4224PCI335, pbn_fastcom335_4),