From: Julia Lawall <Julia.Lawall@xxxxxxx> 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@xxxxxxx> --- __iio_remove_event_config_attrs kfrees the elements of a list, but doesn't actually remove them from the list. Perhaps for safety this should be cleaned up as well. Not tested. drivers/iio/industrialio-event.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c index fa6543b..78570c7 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) -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
