linux-kernel - [PATCH net v1] i40e:Fix an NULL vs IS_ERR() bug for debugfs_create

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Date:   Thu, 13 Jul 2023 09:42:39 +0800
From:   Wang Ming <machel@...o.com>
To:     Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Shannon Nelson <shannon.nelson@...el.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Wang Ming <machel@...o.com>
Subject: [PATCH net v1] i40e:Fix an NULL vs IS_ERR() bug for debugfs_create_dir()

The debugfs_create_dir() function returns error pointers.
It never returns NULL. Most incorrect error checks were fixed,
but the one in i40e_dbg_init() was forgotten.

Fix the remaining error check.

Signed-off-by: Wang Ming <machel@...o.com>

Fixes: 02e9c290814c ("i40e: debugfs interface")
---
 drivers/net/ethernet/intel/i40e/i40e_debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
index 9954493cd448..62497f5565c5 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
@@ -1839,7 +1839,7 @@ void i40e_dbg_pf_exit(struct i40e_pf *pf)
 void i40e_dbg_init(void)
 {
 	i40e_dbg_root = debugfs_create_dir(i40e_driver_name, NULL);
-	if (!i40e_dbg_root)
+	if (IS_ERR(i40e_dbg_root))
 		pr_info("init of debugfs failed\n");
 }
 
-- 
2.25.1