The logic at vivid_radio_rx_g_tuner() is producint an overflow warning: drivers/media/platform/vivid/vivid-radio-rx.c:250 vivid_radio_rx_g_tuner() warn: potential negative subtraction from max '65535 - (__builtin_choose_expr( == || == , , __builtin_choose_expr( == || == , , __builtin_choose_expr( == || == , , __builtin_choose_expr( == || == , , __builtin_choose_expr( == || == , , __builtin_choose_expr( == , , (0))))))) * 65535) / delta' Add a cast to prevent that. Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx> --- drivers/media/platform/vivid/vivid-radio-rx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/platform/vivid/vivid-radio-rx.c b/drivers/media/platform/vivid/vivid-radio-rx.c index acbfea2cce76..1f86d7d4f72f 100644 --- a/drivers/media/platform/vivid/vivid-radio-rx.c +++ b/drivers/media/platform/vivid/vivid-radio-rx.c @@ -247,7 +247,7 @@ int vivid_radio_rx_g_tuner(struct file *file, void *fh, struct v4l2_tuner *vt) vt->rangehigh = FM_FREQ_RANGE_HIGH; sig_qual = dev->radio_rx_sig_qual; vt->signal = abs(sig_qual) > delta ? 0 : - 0xffff - (abs(sig_qual) * 0xffff) / delta; + 0xffff - ((unsigned)abs(sig_qual) * 0xffff) / delta; vt->afc = sig_qual > delta ? 0 : sig_qual; if (abs(sig_qual) > delta) vt->rxsubchans = 0; -- 2.14.3
