From 734c2992828c66cee3feb21ecd30a6ac44aecc51 Mon Sep 17 00:00:00 2001
From: Julia Lawall <julia@diku.dk>
Date: Sat, 6 Feb 2010 09:43:41 +0100
Subject: drivers/dma: Correct NULL test
cohd_fin has already been verified not to be NULL, so the argument to
BUG_ON cannot be true.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r@
expression *x;
expression e;
identifier l;
@@
if (x == NULL || ...) {
... when forall
return ...; }
... when != goto l;
when != x = e
when != &x
*x == NULL
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/dma/coh901318.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index b5f2ee0f8e2c..64a937262a40 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -613,8 +613,6 @@ static void dma_tasklet(unsigned long data)
cohd_fin->pending_irqs--;
cohc->completed = cohd_fin->desc.cookie;
- BUG_ON(cohc->nbr_active_done && cohd_fin == NULL);
-
if (cohc->nbr_active_done == 0)
return;
--
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