From: Firo Yang
Date: Fri, 19 May 2017 21:21:46 +0800
> @@ -576,6 +576,10 @@ static int hdlcdrv_ioctl(struct net_device *dev, struct
> ifreq *ifr, int cmd)
> case HDLCDRVCTL_CALIBRATE:
> if(!capable(CAP_SYS_RAWIO))
> return -EPERM;
> + if (!n
The divisor s->par.bitrate will always be 0 until initialized by
ndo_open() and hdlcdrv_open().
In order to fix this divide zero error, check whether the netdevice was
opened by ndo_open() before performing divide.And we also check the the
value of bitrate in case of bad setting of it.
Reported-b
