From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 52979C0650E for ; Wed, 3 Jul 2019 11:40:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1D2F4218A4 for ; Wed, 3 Jul 2019 11:40:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562154002; bh=yPpFHNRRdBgJ0+DNe1EWje3Z8TjgSbL103+1FGdUzm0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=VeDMMw1NqcBafoGxfkGPgqRI+kO/zLkglu/5eywpvL4Qjb6Mib5t5inUhK+RkJmsb z9jVx9CQGruHGJmzvvDmWqP+Gw44XHTf3VOLF5AFkPmLKxvUUQc1BaYuCNww8VkxCx dUIIKabJJZq224GDiZaFNrgzB2VN0uQ55jztwFvU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727046AbfGCLkB (ORCPT ); Wed, 3 Jul 2019 07:40:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:60046 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726768AbfGCLkB (ORCPT ); Wed, 3 Jul 2019 07:40:01 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 7F8E2218A3; Wed, 3 Jul 2019 11:39:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562153999; bh=yPpFHNRRdBgJ0+DNe1EWje3Z8TjgSbL103+1FGdUzm0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=0QRvG9iVMIPmglxa+Z5e1JKdAhSf8SU7P5d7Pn1IpTCf3+dFCYp8ftZYJYaqp/Rea 8xLsVQmTHagEThsFmz92h2elAK+t1qBrgxoJ0de4lhanB7MiYfhQifrBo7hlsVJntP /vwZgIgm4NUU3OUHvutZiCbFbkRk9lBQndkh5/RY= Date: Wed, 3 Jul 2019 13:39:56 +0200 From: Greg Kroah-Hartman To: Stanislaw Gruszka , Helmut Schaa , Kalle Valo Cc: "David S. Miller" , linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v2] rt2x00: no need to check return value of debugfs_create functions Message-ID: <20190703113956.GA26652@kroah.com> References: <20190703065631.GA28822@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190703065631.GA28822@kroah.com> User-Agent: Mutt/1.12.1 (2019-06-15) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Because we don't need to save the individual debugfs files and directories, remove the local storage of them and just remove the entire debugfs directory in a single call, making things a lot simpler. Cc: Stanislaw Gruszka Cc: Helmut Schaa Cc: Kalle Valo Cc: "David S. Miller" Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- v2: - rebase against wireless-drivers-next - clean up the debugfs "blob" creation logic a bit more, no need to care about that return value. .../net/wireless/ralink/rt2x00/rt2x00debug.c | 136 +++++------------- 1 file changed, 35 insertions(+), 101 deletions(-) diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c b/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c index ef5f51512212..4d4e3888ef20 100644 --- a/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00debug.c @@ -65,26 +65,6 @@ struct rt2x00debug_intf { * - crypto stats file */ struct dentry *driver_folder; - struct dentry *driver_entry; - struct dentry *chipset_entry; - struct dentry *dev_flags; - struct dentry *cap_flags; - struct dentry *restart_hw; - struct dentry *register_folder; - struct dentry *csr_off_entry; - struct dentry *csr_val_entry; - struct dentry *eeprom_off_entry; - struct dentry *eeprom_val_entry; - struct dentry *bbp_off_entry; - struct dentry *bbp_val_entry; - struct dentry *rf_off_entry; - struct dentry *rf_val_entry; - struct dentry *rfcsr_off_entry; - struct dentry *rfcsr_val_entry; - struct dentry *queue_folder; - struct dentry *queue_frame_dump_entry; - struct dentry *queue_stats_entry; - struct dentry *crypto_stats_entry; /* * The frame dump file only allows a single reader, @@ -596,39 +576,34 @@ static const struct file_operations rt2x00debug_restart_hw = { .llseek = generic_file_llseek, }; -static struct dentry *rt2x00debug_create_file_driver(const char *name, - struct rt2x00debug_intf - *intf, - struct debugfs_blob_wrapper - *blob) +static void rt2x00debug_create_file_driver(const char *name, + struct rt2x00debug_intf *intf, + struct debugfs_blob_wrapper *blob) { char *data; data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL); if (!data) - return NULL; + return; blob->data = data; data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name); data += sprintf(data, "version:\t%s\n", DRV_VERSION); blob->size = strlen(blob->data); - return debugfs_create_blob(name, 0400, intf->driver_folder, blob); + debugfs_create_blob(name, 0400, intf->driver_folder, blob); } -static struct dentry *rt2x00debug_create_file_chipset(const char *name, - struct rt2x00debug_intf - *intf, - struct - debugfs_blob_wrapper - *blob) +static void rt2x00debug_create_file_chipset(const char *name, + struct rt2x00debug_intf *intf, + struct debugfs_blob_wrapper *blob) { const struct rt2x00debug *debug = intf->debug; char *data; data = kzalloc(9 * MAX_LINE_LENGTH, GFP_KERNEL); if (!data) - return NULL; + return; blob->data = data; data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt); @@ -654,13 +629,15 @@ static struct dentry *rt2x00debug_create_file_chipset(const char *name, blob->size = strlen(blob->data); - return debugfs_create_blob(name, 0400, intf->driver_folder, blob); + debugfs_create_blob(name, 0400, intf->driver_folder, blob); } void rt2x00debug_register(struct rt2x00_dev *rt2x00dev) { const struct rt2x00debug *debug = rt2x00dev->ops->debugfs; struct rt2x00debug_intf *intf; + struct dentry *queue_folder; + struct dentry *register_folder; intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL); if (!intf) { @@ -676,43 +653,27 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev) debugfs_create_dir(intf->rt2x00dev->ops->name, rt2x00dev->hw->wiphy->debugfsdir); - intf->driver_entry = - rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob); + rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob); + rt2x00debug_create_file_chipset("chipset", intf, &intf->chipset_blob); + debugfs_create_file("dev_flags", 0400, intf->driver_folder, intf, + &rt2x00debug_fop_dev_flags); + debugfs_create_file("cap_flags", 0400, intf->driver_folder, intf, + &rt2x00debug_fop_cap_flags); + debugfs_create_file("restart_hw", 0200, intf->driver_folder, intf, + &rt2x00debug_restart_hw); - intf->chipset_entry = - rt2x00debug_create_file_chipset("chipset", - intf, &intf->chipset_blob); - - intf->dev_flags = debugfs_create_file("dev_flags", 0400, - intf->driver_folder, intf, - &rt2x00debug_fop_dev_flags); - - intf->cap_flags = debugfs_create_file("cap_flags", 0400, - intf->driver_folder, intf, - &rt2x00debug_fop_cap_flags); - - intf->restart_hw = debugfs_create_file("restart_hw", 0200, - intf->driver_folder, intf, - &rt2x00debug_restart_hw); - - intf->register_folder = - debugfs_create_dir("register", intf->driver_folder); + register_folder = debugfs_create_dir("register", intf->driver_folder); #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \ ({ \ if (debug->__name.read) { \ - (__intf)->__name##_off_entry = \ - debugfs_create_u32(__stringify(__name) "_offset", \ - 0600, \ - (__intf)->register_folder, \ - &(__intf)->offset_##__name); \ + debugfs_create_u32(__stringify(__name) "_offset", 0600, \ + register_folder, \ + &(__intf)->offset_##__name); \ \ - (__intf)->__name##_val_entry = \ - debugfs_create_file(__stringify(__name) "_value", \ - 0600, \ - (__intf)->register_folder, \ - (__intf), \ - &rt2x00debug_fop_##__name); \ + debugfs_create_file(__stringify(__name) "_value", 0600, \ + register_folder, (__intf), \ + &rt2x00debug_fop_##__name); \ } \ }) @@ -724,26 +685,21 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev) #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY - intf->queue_folder = - debugfs_create_dir("queue", intf->driver_folder); + queue_folder = debugfs_create_dir("queue", intf->driver_folder); - intf->queue_frame_dump_entry = - debugfs_create_file("dump", 0400, intf->queue_folder, - intf, &rt2x00debug_fop_queue_dump); + debugfs_create_file("dump", 0400, queue_folder, intf, + &rt2x00debug_fop_queue_dump); skb_queue_head_init(&intf->frame_dump_skbqueue); init_waitqueue_head(&intf->frame_dump_waitqueue); - intf->queue_stats_entry = - debugfs_create_file("queue", 0400, intf->queue_folder, - intf, &rt2x00debug_fop_queue_stats); + debugfs_create_file("queue", 0400, queue_folder, intf, + &rt2x00debug_fop_queue_stats); #ifdef CONFIG_RT2X00_LIB_CRYPTO if (rt2x00_has_cap_hw_crypto(rt2x00dev)) - intf->crypto_stats_entry = - debugfs_create_file("crypto", 0444, intf->queue_folder, - intf, - &rt2x00debug_fop_crypto_stats); + debugfs_create_file("crypto", 0444, queue_folder, intf, + &rt2x00debug_fop_crypto_stats); #endif return; @@ -758,29 +714,7 @@ void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev) skb_queue_purge(&intf->frame_dump_skbqueue); -#ifdef CONFIG_RT2X00_LIB_CRYPTO - debugfs_remove(intf->crypto_stats_entry); -#endif - debugfs_remove(intf->queue_stats_entry); - debugfs_remove(intf->queue_frame_dump_entry); - debugfs_remove(intf->queue_folder); - debugfs_remove(intf->rfcsr_val_entry); - debugfs_remove(intf->rfcsr_off_entry); - debugfs_remove(intf->rf_val_entry); - debugfs_remove(intf->rf_off_entry); - debugfs_remove(intf->bbp_val_entry); - debugfs_remove(intf->bbp_off_entry); - debugfs_remove(intf->eeprom_val_entry); - debugfs_remove(intf->eeprom_off_entry); - debugfs_remove(intf->csr_val_entry); - debugfs_remove(intf->csr_off_entry); - debugfs_remove(intf->register_folder); - debugfs_remove(intf->dev_flags); - debugfs_remove(intf->restart_hw); - debugfs_remove(intf->cap_flags); - debugfs_remove(intf->chipset_entry); - debugfs_remove(intf->driver_entry); - debugfs_remove(intf->driver_folder); + debugfs_remove_recursive(intf->driver_folder); kfree(intf->chipset_blob.data); kfree(intf->driver_blob.data); kfree(intf); -- 2.22.0