wifi: rtw88: debug: Fix the NULL vs IS_ERR() bug for debugfs_create_file()

[ Upstream commit 74f7957c9b1b95553faaf146a2553e023a9d1720 ]

Since debugfs_create_file() return ERR_PTR and never return NULL, so use
IS_ERR() to check it instead of checking NULL.

Fixes: e3037485c68e ("rtw88: new Realtek 802.11ac driver")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230919050651.962694-1-ruanjinjie@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wireless/realtek/rtw88/debug.c
index f8ba133..35bc37a 100644 (file)
--- a/drivers/net/wireless/realtek/rtw88/debug.c
+++ b/drivers/net/wireless/realtek/rtw88/debug.c
@@ -1233,9 +1233,9 @@ static struct rtw_debugfs_priv rtw_debug_priv_dm_cap = {
 #define rtw_debugfs_add_core(name, mode, fopname, parent)              \
        do {                                                            \
                rtw_debug_priv_ ##name.rtwdev = rtwdev;                 \
-               if (!debugfs_create_file(#name, mode,                   \
+               if (IS_ERR(debugfs_create_file(#name, mode,             \
                                         parent, &rtw_debug_priv_ ##name,\
-                                        &file_ops_ ##fopname))         \
+                                        &file_ops_ ##fopname)))        \
                        pr_debug("Unable to initialize debugfs:%s\n",   \
                               #name);                                  \
        } while (0)