| Message ID | 20220117082852.3370869-2-o.rempel@pengutronix.de (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [v3,1/2] iio: adc: tsc2046: add .read_raw support | expand |
diff --git a/drivers/iio/adc/ti-tsc2046.c b/drivers/iio/adc/ti-tsc2046.c index 95771ceba206..55b35570ad8b 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 < ARRAY_SIZE(priv->l); 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;
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> --- drivers/iio/adc/ti-tsc2046.c | 6 ++++++ 1 file changed, 6 insertions(+)