From patchwork Wed Nov 7 22:20:42 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anatolij Gustschin X-Patchwork-Id: 10673141 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 889B314BD for ; Wed, 7 Nov 2018 22:20:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6B8572D2EE for ; Wed, 7 Nov 2018 22:20:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5F97F2D365; Wed, 7 Nov 2018 22:20:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2A5F12D2EE for ; Wed, 7 Nov 2018 22:20:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727164AbeKHHxK (ORCPT ); Thu, 8 Nov 2018 02:53:10 -0500 Received: from mail-out.m-online.net ([212.18.0.9]:39815 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727068AbeKHHxK (ORCPT ); Thu, 8 Nov 2018 02:53:10 -0500 Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 42r18C57Qvz1qvvk; Wed, 7 Nov 2018 23:20:43 +0100 (CET) Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 42r18C4vXpz1qrnG; Wed, 7 Nov 2018 23:20:43 +0100 (CET) X-Virus-Scanned: amavisd-new at mnet-online.de Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id 4KtTRv4Wt7de; Wed, 7 Nov 2018 23:20:42 +0100 (CET) X-Auth-Info: 465jrQA+z7Rd2WrxaPkQBCJwl054wTr5/dZi4Myd8Ts= Received: from crub.agik.hopto.org (p5088702D.dip0.t-ipconnect.de [80.136.112.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Wed, 7 Nov 2018 23:20:42 +0100 (CET) From: Anatolij Gustschin To: linux-fpga@vger.kernel.org Cc: atull@kernel.org, mdf@kernel.org Subject: [PATCH v2] fpga: altera-cvp: fix probing for multiple FPGAs on the bus Date: Wed, 7 Nov 2018 23:20:42 +0100 Message-Id: <20181107222042.17942-1-agust@denx.de> X-Mailer: git-send-email 2.17.1 Sender: linux-fpga-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Currently registering CvP managers works only for first probed CvP device, for all other devices it is refused due to duplicated chkcfg sysfs entry: fpga_manager fpga3: Altera CvP FPGA Manager @0000:0c:00.0 registered sysfs: cannot create duplicate filename '/bus/pci/drivers/altera-cvp/chkcfg' CPU: 0 PID: 3808 Comm: bash Tainted: G O 4.19.0-custom+ #5 Call Trace: dump_stack+0x46/0x5b sysfs_warn_dup+0x53/0x60 sysfs_add_file_mode_ns+0x16d/0x180 sysfs_create_file_ns+0x51/0x60 altera_cvp_probe+0x16f/0x2a0 [altera_cvp] local_pci_probe+0x3f/0xa0 ? pci_match_device+0xb1/0xf0 pci_device_probe+0x116/0x170 really_probe+0x21b/0x2c0 driver_probe_device+0x4b/0xe0 bind_store+0xcb/0x130 kernfs_fop_write+0xfd/0x180 __vfs_write+0x21/0x150 ? selinux_file_permission+0xdc/0x130 vfs_write+0xa8/0x1a0 ? find_vma+0xd/0x60 ksys_write+0x3d/0x90 do_syscall_64+0x44/0xf0 entry_SYSCALL_64_after_hwframe+0x44/0xa9 ... altera-cvp 0000:0c:00.0: Can't create sysfs chkcfg file fpga_manager fpga3: fpga_mgr_unregister Altera CvP FPGA Manager @0000:0c:00.0 Move chkcfg creation to module init as suggested by Alan. Signed-off-by: Anatolij Gustschin Acked-by: Alan Tull --- Changes in v2: - don't add a counter, move sysfs entry creation to module init instead drivers/fpga/altera-cvp.c | 34 ++++++++++++++++++++++++---------- 1 file changed, 24 insertions(+), 10 deletions(-) diff --git a/drivers/fpga/altera-cvp.c b/drivers/fpga/altera-cvp.c index 144fa2a4d4cc..74bf1e8ff616 100644 --- a/drivers/fpga/altera-cvp.c +++ b/drivers/fpga/altera-cvp.c @@ -466,14 +466,6 @@ static int altera_cvp_probe(struct pci_dev *pdev, if (ret) goto err_unmap; - ret = driver_create_file(&altera_cvp_driver.driver, - &driver_attr_chkcfg); - if (ret) { - dev_err(&pdev->dev, "Can't create sysfs chkcfg file\n"); - fpga_mgr_unregister(mgr); - goto err_unmap; - } - return 0; err_unmap: @@ -492,7 +484,6 @@ static void altera_cvp_remove(struct pci_dev *pdev) struct altera_cvp_conf *conf = mgr->priv; u16 cmd; - driver_remove_file(&altera_cvp_driver.driver, &driver_attr_chkcfg); fpga_mgr_unregister(mgr); if (conf->map) pci_iounmap(pdev, conf->map); @@ -502,7 +493,30 @@ static void altera_cvp_remove(struct pci_dev *pdev) pci_write_config_word(pdev, PCI_COMMAND, cmd); } -module_pci_driver(altera_cvp_driver); +static int __init altera_cvp_init(void) +{ + int ret; + + ret = pci_register_driver(&altera_cvp_driver); + if (ret) + return ret; + + ret = driver_create_file(&altera_cvp_driver.driver, + &driver_attr_chkcfg); + if (ret) + pr_warn("Can't create sysfs chkcfg file\n"); + + return 0; +} + +static void __exit altera_cvp_exit(void) +{ + driver_remove_file(&altera_cvp_driver.driver, &driver_attr_chkcfg); + pci_unregister_driver(&altera_cvp_driver); +} + +module_init(altera_cvp_init); +module_exit(altera_cvp_exit); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Anatolij Gustschin ");