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authorJulia Lawall <Julia.Lawall@lip6.fr>2012-10-21 11:52:00 +0100
committerJonathan Cameron <jic23@kernel.org>2012-11-17 10:17:20 +0000
commite3db9ef6eb39ac6d969787bc15756778c2c5ca66 (patch)
treea7252ad7c63ba80a924983bad6b3fd3be3fe6c84 /drivers/iio
parente8f45e3341ed8609174f9c21fb47e202f29ab039 (diff)
drivers/iio/industrialio-event.c: eliminate possible double free
The function __iio_add_event_config_attrs is only called once, by the function iio_device_register_eventset. If the call fails, iio_device_register_eventset calls __iio_remove_event_config_attrs. There is thus no need for __iio_add_event_config_attrs to also call __iio_remove_event_config_attrs on failure. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ identifier f,free,a; parameter list[n] ps; type T; expression e; @@ f(ps,T a,...) { ... when any when != a = e if(...) { ... free(a); ... return ...; } ... when any } @@ identifier r.f,r.free; expression x,a; expression list[r.n] xs; @@ * x = f(xs,a,...); if (...) { ... free(a); ... return ...; } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/industrialio-event.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index 857e6306c5c..261cae00557 100644
--- a/drivers/iio/industrialio-event.c
+++ b/drivers/iio/industrialio-event.c
@@ -350,15 +350,10 @@ static inline int __iio_add_event_config_attrs(struct iio_dev *indio_dev)
ret = iio_device_add_event_sysfs(indio_dev,
&indio_dev->channels[j]);
if (ret < 0)
- goto error_clear_attrs;
+ return ret;
attrcount += ret;
}
return attrcount;
-
-error_clear_attrs:
- __iio_remove_event_config_attrs(indio_dev);
-
- return ret;
}
static bool iio_check_for_dynamic_events(struct iio_dev *indio_dev)