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| author | Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm> | 2021-09-14 15:18:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 21:16:02 +0300 |
| commit | 165ca6e8ac5bb208f8b72c4e39e0b0f5ff4d6009 (patch) | |
| tree | b887b76a48fc9b25fb467f594648b84f8d1dcf6d /drivers/power | |
| parent | aaf0562f7147e5345f41a26fa08aa04d37f175f5 (diff) | |
| download | linux-165ca6e8ac5bb208f8b72c4e39e0b0f5ff4d6009.tar.xz | |
power: supply: max17042_battery: Prevent int underflow in set_soc_threshold
commit e660dbb68c6b3f7b9eb8b9775846a44f9798b719 upstream.
max17042_set_soc_threshold gets called with offset set to 1, which means
that minimum threshold value would underflow once SOC got down to 0,
causing invalid alerts from the gauge.
Fixes: e5f3872d2044 ("max17042: Add support for signalling change in SOC")
Cc: <stable@vger.kernel.org>
Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/supply/max17042_battery.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/power/supply/max17042_battery.c b/drivers/power/supply/max17042_battery.c index 8dffae76b6a3..416c1d4bb628 100644 --- a/drivers/power/supply/max17042_battery.c +++ b/drivers/power/supply/max17042_battery.c @@ -857,7 +857,8 @@ static void max17042_set_soc_threshold(struct max17042_chip *chip, u16 off) regmap_read(map, MAX17042_RepSOC, &soc); soc >>= 8; soc_tr = (soc + off) << 8; - soc_tr |= (soc - off); + if (off < soc) + soc_tr |= soc - off; regmap_write(map, MAX17042_SALRT_Th, soc_tr); } |