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Thu, 05 Mar 2026 05:12:54 -0800 (PST) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Thu, 05 Mar 2026 10:12:51 -0300 Message-Id: From: "Kurt Borja" To: "Chunyang Chen" , , Cc: , , , , , Subject: Re: [PATCH v2] iio: adc: ti-ads1018: fix type overflow for data rate X-Mailer: aerc 0.21.0-0-g5549850facc2 References: <20260305021550.120614-1-chenchunyang0908@gmail.com> <20260305124302.129637-1-chenchunyang0908@gmail.com> In-Reply-To: <20260305124302.129637-1-chenchunyang0908@gmail.com> On Thu Mar 5, 2026 at 9:43 AM -03, Chunyang Chen wrote: > The variable 'drate' is currently defined as u8. However, the data rate > values in ads1018 can reach up to 3300 Hz, which exceeds the maximum > value of 255 that a u8 can hold. > > Change the type of 'drate' to u32 to match the data_rate_mode_to_hz > array definition and ensure the data rate is handled correctly. > > Fixes: bf0bba486b5b ("iio: adc: ti-ads1018: add ti-ads1018 driver") > Signed-off-by: Chunyang Chen Reviewed-by: Kurt Borja > > --- > v2: > - Change drate type to u32 as suggested by Kurt. > - Add Fixes tag as requested by Andy. > --- > drivers/iio/adc/ti-ads1018.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/iio/adc/ti-ads1018.c b/drivers/iio/adc/ti-ads1018.c > index 6246b3cab..0780abd0d 100644 > --- a/drivers/iio/adc/ti-ads1018.c > +++ b/drivers/iio/adc/ti-ads1018.c > @@ -249,7 +249,7 @@ static int ads1018_single_shot(struct ads1018 *ads101= 8, > struct iio_chan_spec const *chan, u16 *cnv) > { > u8 max_drate_mode =3D ads1018->chip_info->num_data_rate_mode_to_hz - 1; > - u8 drate =3D ads1018->chip_info->data_rate_mode_to_hz[max_drate_mode]; > + u32 drate =3D ads1018->chip_info->data_rate_mode_to_hz[max_drate_mode]; > u8 pga_mode =3D ads1018->chan_data[chan->scan_index].pga_mode; > struct spi_transfer xfer[2] =3D { > { --=20 Thanks, ~ Kurt