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Subject[PATCH 4.18 119/123] power: generic-adc-battery: check for duplicate properties copied from iio channels
Date
4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: H. Nikolaus Schaller <hns@goldelico.com>

commit a427503edaaed9b75ed9746a654cece7e93e60a8 upstream.

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: e60fea794e6e ("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>

---
drivers/power/supply/generic-adc-battery.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)

--- a/drivers/power/supply/generic-adc-battery.c
+++ b/drivers/power/supply/generic-adc-battery.c
@@ -244,6 +244,7 @@ static int gab_probe(struct platform_dev
int ret = 0;
int chan;
int index = ARRAY_SIZE(gab_props);
+ bool any = false;

adc_bat = devm_kzalloc(&pdev->dev, sizeof(*adc_bat), GFP_KERNEL);
if (!adc_bat) {
@@ -290,12 +291,22 @@ static int gab_probe(struct platform_dev
adc_bat->channel[chan] = NULL;
} else {
/* copying properties for supported channels only */
- psy_desc->properties[index++] = gab_dyn_props[chan];
+ int index2;
+
+ for (index2 = 0; index2 < index; index2++) {
+ if (psy_desc->properties[index2] ==
+ gab_dyn_props[chan])
+ break; /* already known */
+ }
+ if (index2 == index) /* really new */
+ psy_desc->properties[index++] =
+ gab_dyn_props[chan];
+ any = true;
}
}

/* none of the channels are supported so let's bail out */
- if (index == ARRAY_SIZE(gab_props)) {
+ if (!any) {
ret = -ENODEV;
goto second_mem_fail;
}

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