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commita427503edaupstream. If an iio channel defines a basic property, there are duplicate entries in /sys/class/power/*/uevent. So add a check to avoid duplicates. Since all channels may be duplicates, we have to modify the related error check. Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com> Cc: stable@vger.kernel.org Fixes:e60fea794e("power: battery: Generic battery driver using IIO") Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>