[PATCH] orinoco: Add ESSID specific scanning for Agere fw

Pass the ESSID to the card.

This allows 'iwlist eth1 scan essid <essid>' to work, and will help with 
routers setup not to broadcast the ESSID.

Signed-off-by: David Kilroy <kilroyd-Re5JQEeQqe8AvxtiuMwx3w@xxxxxxxxxxxxxxxx>
---
This patch is against a recent tree which has the following patch applied
'orinoco: more reliable scan handling'
<http://article.gmane.org/gmane.linux.kernel.wireless.general/6686>
but should be simple enough to apply to a tree without it.

diff --git a/drivers/net/wireless/orinoco.c b/drivers/net/wireless/orinoco.c
index 24cec93..6411d61 100644
--- a/drivers/net/wireless/orinoco.c
+++ b/drivers/net/wireless/orinoco.c
@@ -3986,6 +3986,7 @@ static int orinoco_ioctl_setscan(struct net_device *dev,
 {
        struct orinoco_private *priv = netdev_priv(dev);
        hermes_t *hw = &priv->hw;
+       struct iw_scan_req *si = (struct iw_scan_req*) extra;
        int err = 0;
        unsigned long flags;
 
@@ -4046,7 +4047,19 @@ static int orinoco_ioctl_setscan(struct net_device *dev,
                }
                break;
                case FIRMWARE_TYPE_AGERE:
-                       err = hermes_write_wordrec(hw, USER_BAP,
+                       if (flags & IW_SCAN_THIS_ESSID) {
+                               struct hermes_idstring idbuf;
+                               size_t len = min(sizeof(idbuf.val),
+                                                (size_t) si->essid_len);
+                               idbuf.len = cpu_to_le16(len);
+                               memcpy(idbuf.val, si->essid, len);
+
+                               err = hermes_write_ltv(hw, USER_BAP,
+                                              HERMES_RID_CNFSCANSSID_AGERE,
+                                              HERMES_BYTES_TO_RECLEN(len + 2),
+                                              &idbuf);
+                       } else
+                               err = hermes_write_wordrec(hw, USER_BAP,
                                                   HERMES_RID_CNFSCANSSID_AGERE,
                                                   0);  /* Any ESSID */
                        if (err)

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