diff options
| author | Oleksij Rempel <o.rempel@pengutronix.de> | 2022-01-17 09:28:52 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-01-23 18:03:37 +0000 |
| commit | 576434fd93b91d36cb62d531888e88dac5e52540 (patch) | |
| tree | 0ffbd9d6a5c604b467b327a518fb8ab272c1a37c /drivers/iio/adc | |
| parent | b617693a5d139dec0a3a19a909d687d2d95d78bc (diff) | |
| download | linux-576434fd93b91d36cb62d531888e88dac5e52540.tar.bz2 | |
iio: adc: tsc2046: add sanity check to avoid to big allocations
To avoid problematic devicetree configurations. Set allocation limit
with error message and suggestion on what can be done to solve this
issue.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20220117082852.3370869-2-o.rempel@pengutronix.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/adc')
| -rw-r--r-- | drivers/iio/adc/ti-tsc2046.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/iio/adc/ti-tsc2046.c b/drivers/iio/adc/ti-tsc2046.c index eb219ff3d610..2b87f39f377a 100644 --- a/drivers/iio/adc/ti-tsc2046.c +++ b/drivers/iio/adc/ti-tsc2046.c @@ -679,6 +679,12 @@ static int tsc2046_adc_setup_spi_msg(struct tsc2046_adc_priv *priv) for (ch_idx = 0; ch_idx < priv->dcfg->num_channels; ch_idx++) size += tsc2046_adc_group_set_layout(priv, ch_idx, ch_idx); + if (size > PAGE_SIZE) { + dev_err(&priv->spi->dev, + "Calculated scan buffer is too big. Try to reduce spi-max-frequency, settling-time-us or oversampling-ratio\n"); + return -ENOSPC; + } + priv->tx = devm_kzalloc(&priv->spi->dev, size, GFP_KERNEL); if (!priv->tx) return -ENOMEM; |