On Sun, Sep 09, 2012 at 11:31:42PM +0300, Dan Carpenter wrote: > Several of the drivers use carrier as a divisor in their s_tx_carrier() > functions. We should do a sanity check here like we do for > LIRC_SET_REC_CARRIER. > > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> > --- > v2: Ben Hutchings pointed out that my first patch was not a complete > fix. > > diff --git a/drivers/media/rc/ir-lirc-codec.c b/drivers/media/rc/ir-lirc-codec.c > index 6ad4a07..28dc0f0 100644 > --- a/drivers/media/rc/ir-lirc-codec.c > +++ b/drivers/media/rc/ir-lirc-codec.c > @@ -211,6 +211,9 @@ static long ir_lirc_ioctl(struct file *filep, unsigned int cmd, > if (!dev->s_tx_carrier) > return -EINVAL; This should be ENOSYS. > > + if (val <= 0) > + return -EINVAL; > + 1) val is unsigned so it would never be less than zero. 2) A value of zero means disabling carrier modulation, which is used by the mceusb driver. So the check belongs in the individual drivers, as in the original patch. Sean -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
