Re: ioctl

Frederic wrote:

> static int ipw_get_status(struct net_device *dev, struct iwreq *wreq) {
> 	struct ipw_priv *priv = ieee80211_priv(dev);
> 	mutex_lock(&priv->mutex);
> 	wreq->u.uparam.value = priv->status;
> 	IPW_DEBUG_WX("Get status -> %d\n", wreq->u.param.value);
> 	mutex_unlock(&priv->mutex);
> 	return 0;
> }

You cannot access user space memory from kernel space like that.

You must copy the arguments from and back to userspace using dedicated
kernel functions/macro's. See other drivers' ioctls.

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