[PATCH] orinoco: fix setting transmit key only

[Dan Williams <dcbw@redhat.com>]

When determining whether there's a key to set or not, orinoco should be
looking at the key length, not the key data.  Otherwise confusion reigns
when trying to set TX key only, passing in zero-length key, but non-NULL
pointer.  Key length takes precedence over non-NULL key data.

Signed-off-by: Dan Williams <dcbw@redhat.com>

diff --git a/drivers/net/wireless/orinoco.c b/drivers/net/wireless/orinoco.c
index 8a31b59..1e69bc6 100644
--- a/drivers/net/wireless/orinoco.c
+++ b/drivers/net/wireless/orinoco.c
@@ -2876,7 +2876,7 @@ static int orinoco_ioctl_setiwencode(str
 	if (orinoco_lock(priv, &flags) != 0)
 		return -EBUSY;
 
-	if (erq->pointer) {
+	if (erq->length > 0) {
 		if ((index < 0) || (index >= ORINOCO_MAX_KEYS))
 			index = priv->tx_key;
 
@@ -2919,7 +2919,7 @@ static int orinoco_ioctl_setiwencode(str
 	if (erq->flags & IW_ENCODE_RESTRICTED)
 		restricted = 1;
 
-	if (erq->pointer) {
+	if (erq->pointer && erq->length > 0) {
 		priv->keys[index].len = cpu_to_le16(xlen);
 		memset(priv->keys[index].data, 0,
 		       sizeof(priv->keys[index].data));