lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20190810101732.26612-7-gregkh@linuxfoundation.org>
Date:   Sat, 10 Aug 2019 12:17:21 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     netdev@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Vishal Kulkarni <vishal@...lsio.com>,
        "David S. Miller" <davem@...emloft.net>,
        Casey Leedom <leedom@...lsio.com>
Subject: [PATCH v3 06/17] cxgb4: no need to check return value of debugfs_create functions

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.

If a debugfs call fails, it will properly warn in the syslog, there's no
need for all individual drivers to also print a message, so that is one
more reason to not care about checking the return values.

Cc: Vishal Kulkarni <vishal@...lsio.com>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Casey Leedom <leedom@...lsio.com>
Cc: netdev@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 .../ethernet/chelsio/cxgb4/cxgb4_debugfs.c    |  5 ++---
 .../net/ethernet/chelsio/cxgb4/cxgb4_main.c   |  3 ---
 .../ethernet/chelsio/cxgb4vf/cxgb4vf_main.c   | 21 +++++++------------
 3 files changed, 9 insertions(+), 20 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
index 02959035ed3f..dd99c55d9a88 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
@@ -3529,7 +3529,6 @@ int t4_setup_debugfs(struct adapter *adap)
 {
 	int i;
 	u32 size = 0;
-	struct dentry *de;
 
 	static struct t4_debugfs_entry t4_debugfs_files[] = {
 		{ "cim_la", &cim_la_fops, 0400, 0 },
@@ -3640,8 +3639,8 @@ int t4_setup_debugfs(struct adapter *adap)
 		}
 	}
 
-	de = debugfs_create_file_size("flash", 0400, adap->debugfs_root, adap,
-				      &flash_debugfs_fops, adap->params.sf_size);
+	debugfs_create_file_size("flash", 0400, adap->debugfs_root, adap,
+				 &flash_debugfs_fops, adap->params.sf_size);
 	debugfs_create_bool("use_backdoor", 0600,
 			    adap->debugfs_root, &adap->use_bd);
 	debugfs_create_bool("trace_rss", 0600,
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 4311ad9c84b2..71854a19cebe 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -6269,10 +6269,7 @@ static int __init cxgb4_init_module(void)
 {
 	int ret;
 
-	/* Debugfs support is optional, just warn if this fails */
 	cxgb4_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
-	if (!cxgb4_debugfs_root)
-		pr_warn("could not create debugfs entry, continuing\n");
 
 	ret = pci_register_driver(&cxgb4_driver);
 	if (ret < 0)
diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
index 6d4cf3d0b2f0..f6fc0875d5b0 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
@@ -2478,11 +2478,10 @@ static int setup_debugfs(struct adapter *adapter)
 	 * Debugfs support is best effort.
 	 */
 	for (i = 0; i < ARRAY_SIZE(debugfs_files); i++)
-		(void)debugfs_create_file(debugfs_files[i].name,
-				  debugfs_files[i].mode,
-				  adapter->debugfs_root,
-				  (void *)adapter,
-				  debugfs_files[i].fops);
+		debugfs_create_file(debugfs_files[i].name,
+				    debugfs_files[i].mode,
+				    adapter->debugfs_root, (void *)adapter,
+				    debugfs_files[i].fops);
 
 	return 0;
 }
@@ -3257,11 +3256,7 @@ static int cxgb4vf_pci_probe(struct pci_dev *pdev,
 		adapter->debugfs_root =
 			debugfs_create_dir(pci_name(pdev),
 					   cxgb4vf_debugfs_root);
-		if (IS_ERR_OR_NULL(adapter->debugfs_root))
-			dev_warn(&pdev->dev, "could not create debugfs"
-				 " directory");
-		else
-			setup_debugfs(adapter);
+		setup_debugfs(adapter);
 	}
 
 	/*
@@ -3486,13 +3481,11 @@ static int __init cxgb4vf_module_init(void)
 		return -EINVAL;
 	}
 
-	/* Debugfs support is optional, just warn if this fails */
+	/* Debugfs support is optional, debugfs will warn if this fails */
 	cxgb4vf_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
-	if (IS_ERR_OR_NULL(cxgb4vf_debugfs_root))
-		pr_warn("could not create debugfs entry, continuing\n");
 
 	ret = pci_register_driver(&cxgb4vf_driver);
-	if (ret < 0 && !IS_ERR_OR_NULL(cxgb4vf_debugfs_root))
+	if (ret < 0)
 		debugfs_remove(cxgb4vf_debugfs_root);
 	return ret;
 }
-- 
2.22.0

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ