1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index bbba014c9939..89777ed9abd8 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -1007,8 +1007,11 @@ static int at91_adc_probe(struct platform_device *pdev)
          * the best converted final value between two channels selection
          * The formula thus is : Sample and Hold Time = (shtim + 1) / ADCClock
          */
-        shtim = round_up((st->sample_hold_time * adc_clk_khz /
-                          1000) - 1, 1);
+        if (st->sample_hold_time > 0)
+                shtim = round_up((st->sample_hold_time * adc_clk_khz / 1000)
+                                 - 1, 1);
+        else
+                shtim = 0;
 
         reg = AT91_ADC_PRESCAL_(prsc) & st->registers->mr_prescal_mask;
         reg |= AT91_ADC_STARTUP_(ticks) & st->registers->mr_startup_mask;