linux-kernel - [PATCH] staging: rtl8188eu: Drop unnecessary NULL check after container

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Message-Id: <20210514165557.1384106-1-linux@roeck-us.net>
Date:   Fri, 14 May 2021 09:55:57 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH] staging: rtl8188eu: Drop unnecessary NULL check after container_of

The result of container_of() operations is never NULL unless the extracted
element is the first element of the embedded structure. This is not the
case here. The NULL check is therefore unnecessary and misleading.
Remove it.

This change was made automatically with the following Coccinelle script.

@@
type t;
identifier v;
statement s;
@@

<+...
(
  t v = container_of(...);
|
  v = container_of(...);
)
  ...
  when != v
- if (\( !v \| v == NULL \) ) s
...+>

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/staging/rtl8188eu/core/rtw_mlme_ext.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
index fc991c8c16d2..b4d81d3a856c 100644
--- a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
@@ -4038,9 +4038,6 @@ void free_mlme_ext_priv(struct mlme_ext_priv *pmlmeext)
 {
 	struct adapter *padapter = container_of(pmlmeext, struct adapter, mlmeextpriv);
 
-	if (!padapter)
-		return;
-
 	if (padapter->bDriverStopped) {
 		del_timer_sync(&pmlmeext->survey_timer);
 		del_timer_sync(&pmlmeext->link_timer);
-- 
2.25.1