From ec96cfd8215af1cda016837efb266409164e3a30 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Sun, 12 Jul 2009 22:05:33 +0200 Subject: [PATCH] drivers/net: Drop unnecessary NULL test The result of container_of should not be NULL. In particular, in this case the argument to the enclosing function has passed though INIT_WORK, which dereferences it, implying that its container cannot be NULL. A simplified version of the semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // @@ identifier fn,work,x,fld; type T; expression E1,E2; statement S; @@ static fn(struct work_struct *work) { ... when != work = E1 x = container_of(work,T,fld) ... when != x = E2 - if (x == NULL) S ... } // Signed-off-by: Julia Lawall Acked-by: Zhu Yi Signed-off-by: John W. Linville --- drivers/net/wireless/ipw2x00/ipw2200.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/net/wireless/ipw2x00/ipw2200.c b/drivers/net/wireless/ipw2x00/ipw2200.c index d726b3c..2dc1cdb 100644 --- a/drivers/net/wireless/ipw2x00/ipw2200.c +++ b/drivers/net/wireless/ipw2x00/ipw2200.c @@ -7250,9 +7250,6 @@ static void ipw_bg_qos_activate(struct work_struct *work) struct ipw_priv *priv = container_of(work, struct ipw_priv, qos_activate); - if (priv == NULL) - return; - mutex_lock(&priv->mutex); if (priv->status & STATUS_ASSOCIATED) -- 2.7.4