Gitweb:     http://git.kernel.org/linus/542f491542b0312f8b28e17a013f6f8f114bda68
Commit:     542f491542b0312f8b28e17a013f6f8f114bda68
Parent:     2bb6a12a88aeac9bab4ed0cf0da1edc03f5eb686
Author:     Julia Lawall <julia@diku.dk>
AuthorDate: Fri Sep 11 18:22:27 2009 +0200
Committer:  Greg Kroah-Hartman <gregkh@suse.de>
CommitDate: Tue Sep 15 12:02:34 2009 -0700

    Staging: iio: introduce missing kfree
    
    Error handling code following a kmalloc or kzalloc should free the
    allocated data.
    
    The semantic match that finds the problem is as follows:
    (http://www.emn.fr/x-info/coccinelle/)
    
    // <smpl>
    @r exists@
    local idexpression x;
    statement S;
    expression E;
    identifier f,f1,l;
    position p1,p2;
    expression *ptr != NULL;
    @@
    
    x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
    ...
    if (x == NULL) S
    <... when != x
         when != if (...) { <+...x...+> }
    (
    x->f1 = E
    |
     (x->f1 == NULL || ...)
    |
     f(...,x->f1,...)
    )
    ...>
    (
     return \(0\|<+...x...+>\|ptr\);
    |
     return@p2 ...;
    )
    
    @script:python@
    p1 << r.p1;
    p2 << r.p2;
    @@
    
    print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
    // </smpl>
    
    Signed-off-by: Julia Lawall <julia@diku.dk>
---
 drivers/staging/iio/accel/lis3l02dq_ring.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/iio/accel/lis3l02dq_ring.c b/drivers/staging/iio/accel/lis3l02dq_ring.c
index c21198d..a6b7c72 100644
--- a/drivers/staging/iio/accel/lis3l02dq_ring.c
+++ b/drivers/staging/iio/accel/lis3l02dq_ring.c
@@ -286,6 +286,7 @@ static void lis3l02dq_trigger_bh_to_ring(struct work_struct *work_s)
 	rx_array = kmalloc(4 * (st->indio_dev->scan_count), GFP_KERNEL);
 	if (rx_array == NULL) {
 		dev_err(&st->us->dev, "memory alloc failed in ring bh");
+		kfree(data);
 		return;
 	}
 
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