From 3cad3da3ed9ece03704f7d67e038b8ae710fa312 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Sun, 12 Jul 2009 22:05:03 +0200 Subject: drivers/isdn: 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 Signed-off-by: Karsten Keil --- drivers/isdn/hisax/icc.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/isdn/hisax/icc.c') diff --git a/drivers/isdn/hisax/icc.c b/drivers/isdn/hisax/icc.c index 682cac32f25..9aba646ba22 100644 --- a/drivers/isdn/hisax/icc.c +++ b/drivers/isdn/hisax/icc.c @@ -83,8 +83,6 @@ icc_bh(struct work_struct *work) container_of(work, struct IsdnCardState, tqueue); struct PStack *stptr; - if (!cs) - return; if (test_and_clear_bit(D_CLEARBUSY, &cs->event)) { if (cs->debug) debugl1(cs, "D-Channel Busy cleared"); -- cgit v1.2.3-70-g09d2