From patchwork Tue Jun 11 19:10:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 10988197 X-Patchwork-Delegate: kvalo@adurom.com 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 01D3776 for ; Tue, 11 Jun 2019 19:10:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E12ED22B1F for ; Tue, 11 Jun 2019 19:10:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CF36A26E82; Tue, 11 Jun 2019 19:10:32 +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,DKIM_SIGNED, DKIM_VALID,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 1BF8926E56 for ; Tue, 11 Jun 2019 19:10:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407458AbfFKTKb (ORCPT ); Tue, 11 Jun 2019 15:10:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:43220 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2407141AbfFKTKb (ORCPT ); Tue, 11 Jun 2019 15:10:31 -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 F3E3D2183E; Tue, 11 Jun 2019 19:10:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560280229; bh=IRI2jafQQVnG7eS8oJSDlBqbK7g+mxZls+7IGPq1zVM=; h=Date:From:To:Cc:Subject:From; b=cGYNrZ/7x0YqYE0ikIWkg4OL8Hp2wO7OkDNgP2gbVFdlXqFouYvNtZKTdcNNdvPu4 /lVEpVuW4NYgt2fwWot+ajNLm7+rGKDbtl5jPymIvAwtMftpOVUmay9twp+2QOx3NI BpjGq1R+2tVmoNsXzc229u4hdLeFMTYxP0lke0Jg= Date: Tue, 11 Jun 2019 21:10:24 +0200 From: Greg Kroah-Hartman To: Maya Erez , Kalle Valo Cc: "David S. Miller" , linux-wireless@vger.kernel.org, wil6210@qti.qualcomm.com Subject: [PATCH] wireless: wil6210: no need to check return value of debugfs_create functions Message-ID: <20190611191024.GA17227@kroah.com> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.12.0 (2019-05-25) Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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. Cc: Maya Erez Cc: Kalle Valo Cc: "David S. Miller" Cc: linux-wireless@vger.kernel.org Cc: wil6210@qti.qualcomm.com Signed-off-by: Greg Kroah-Hartman Reviewed-by: Maya Erez --- drivers/net/wireless/ath/wil6210/debugfs.c | 80 ++++++---------------- 1 file changed, 22 insertions(+), 58 deletions(-) diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c index df2adff6c33a..ea5da93196fd 100644 --- a/drivers/net/wireless/ath/wil6210/debugfs.c +++ b/drivers/net/wireless/ath/wil6210/debugfs.c @@ -394,25 +394,18 @@ static int wil_debugfs_iomem_x32_get(void *data, u64 *val) DEFINE_DEBUGFS_ATTRIBUTE(fops_iomem_x32, wil_debugfs_iomem_x32_get, wil_debugfs_iomem_x32_set, "0x%08llx\n"); -static struct dentry *wil_debugfs_create_iomem_x32(const char *name, - umode_t mode, - struct dentry *parent, - void *value, - struct wil6210_priv *wil) +static void wil_debugfs_create_iomem_x32(const char *name, umode_t mode, + struct dentry *parent, void *value, + struct wil6210_priv *wil) { - struct dentry *file; struct wil_debugfs_iomem_data *data = &wil->dbg_data.data_arr[ wil->dbg_data.iomem_data_count]; data->wil = wil; data->offset = value; - file = debugfs_create_file_unsafe(name, mode, parent, data, - &fops_iomem_x32); - if (!IS_ERR_OR_NULL(file)) - wil->dbg_data.iomem_data_count++; - - return file; + debugfs_create_file_unsafe(name, mode, parent, data, &fops_iomem_x32); + wil->dbg_data.iomem_data_count++; } static int wil_debugfs_ulong_set(void *data, u64 val) @@ -430,14 +423,6 @@ static int wil_debugfs_ulong_get(void *data, u64 *val) DEFINE_DEBUGFS_ATTRIBUTE(wil_fops_ulong, wil_debugfs_ulong_get, wil_debugfs_ulong_set, "0x%llx\n"); -static struct dentry *wil_debugfs_create_ulong(const char *name, umode_t mode, - struct dentry *parent, - ulong *value) -{ - return debugfs_create_file_unsafe(name, mode, parent, value, - &wil_fops_ulong); -} - /** * wil6210_debugfs_init_offset - create set of debugfs files * @wil - driver's context, used for printing @@ -454,37 +439,30 @@ static void wil6210_debugfs_init_offset(struct wil6210_priv *wil, int i; for (i = 0; tbl[i].name; i++) { - struct dentry *f; - switch (tbl[i].type) { case doff_u32: - f = debugfs_create_u32(tbl[i].name, tbl[i].mode, dbg, - base + tbl[i].off); + debugfs_create_u32(tbl[i].name, tbl[i].mode, dbg, + base + tbl[i].off); break; case doff_x32: - f = debugfs_create_x32(tbl[i].name, tbl[i].mode, dbg, - base + tbl[i].off); + debugfs_create_x32(tbl[i].name, tbl[i].mode, dbg, + base + tbl[i].off); break; case doff_ulong: - f = wil_debugfs_create_ulong(tbl[i].name, tbl[i].mode, - dbg, base + tbl[i].off); + debugfs_create_file_unsafe(tbl[i].name, tbl[i].mode, + dbg, base + tbl[i].off, + &wil_fops_ulong); break; case doff_io32: - f = wil_debugfs_create_iomem_x32(tbl[i].name, - tbl[i].mode, dbg, - base + tbl[i].off, - wil); + wil_debugfs_create_iomem_x32(tbl[i].name, tbl[i].mode, + dbg, base + tbl[i].off, + wil); break; case doff_u8: - f = debugfs_create_u8(tbl[i].name, tbl[i].mode, dbg, - base + tbl[i].off); + debugfs_create_u8(tbl[i].name, tbl[i].mode, dbg, + base + tbl[i].off); break; - default: - f = ERR_PTR(-EINVAL); } - if (IS_ERR_OR_NULL(f)) - wil_err(wil, "Create file \"%s\": err %ld\n", - tbl[i].name, PTR_ERR(f)); } } @@ -499,19 +477,14 @@ static const struct dbg_off isr_off[] = { {}, }; -static int wil6210_debugfs_create_ISR(struct wil6210_priv *wil, - const char *name, - struct dentry *parent, u32 off) +static void wil6210_debugfs_create_ISR(struct wil6210_priv *wil, + const char *name, struct dentry *parent, + u32 off) { struct dentry *d = debugfs_create_dir(name, parent); - if (IS_ERR_OR_NULL(d)) - return -ENODEV; - wil6210_debugfs_init_offset(wil, d, (void * __force)wil->csr + off, isr_off); - - return 0; } static const struct dbg_off pseudo_isr_off[] = { @@ -521,18 +494,13 @@ static const struct dbg_off pseudo_isr_off[] = { {}, }; -static int wil6210_debugfs_create_pseudo_ISR(struct wil6210_priv *wil, - struct dentry *parent) +static void wil6210_debugfs_create_pseudo_ISR(struct wil6210_priv *wil, + struct dentry *parent) { struct dentry *d = debugfs_create_dir("PSEUDO_ISR", parent); - if (IS_ERR_OR_NULL(d)) - return -ENODEV; - wil6210_debugfs_init_offset(wil, d, (void * __force)wil->csr, pseudo_isr_off); - - return 0; } static const struct dbg_off lgc_itr_cnt_off[] = { @@ -580,13 +548,9 @@ static int wil6210_debugfs_create_ITR_CNT(struct wil6210_priv *wil, struct dentry *d, *dtx, *drx; d = debugfs_create_dir("ITR_CNT", parent); - if (IS_ERR_OR_NULL(d)) - return -ENODEV; dtx = debugfs_create_dir("TX", d); drx = debugfs_create_dir("RX", d); - if (IS_ERR_OR_NULL(dtx) || IS_ERR_OR_NULL(drx)) - return -ENODEV; wil6210_debugfs_init_offset(wil, d, (void * __force)wil->csr, lgc_itr_cnt_off);