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Date: Wed, 1 Jan 2014 14:07:21 +0100
From: Julia Lawall <Julia.Lawall@...6.fr>
To: Jonathan Cameron <jic23@...nel.org>
Cc: kernel-janitors@...r.kernel.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-iio@...r.kernel.org, devel@...verdev.osuosl.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] staging:iio: correct error check
From: Julia Lawall <Julia.Lawall@...6.fr>
iio_kfifo_allocate returns NULL in case of error.
The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression *x;
identifier f;
statement S1,S2;
@@
*x = f(...);
if (x) { <+... when != if (...) S1 else S2
-ENOMEM ...+> }
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
---
drivers/staging/iio/impedance-analyzer/ad5933.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
index 0a4298b..2b96665 100644
--- a/drivers/staging/iio/impedance-analyzer/ad5933.c
+++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
@@ -629,7 +629,7 @@ static int ad5933_register_ring_funcs_and_init(struct iio_dev *indio_dev)
struct iio_buffer *buffer;
buffer = iio_kfifo_allocate(indio_dev);
- if (buffer)
+ if (!buffer)
return -ENOMEM;
iio_device_attach_buffer(indio_dev, buffer);
--
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