libertas: don't blindly try mesh

The CF card only has a very old firmware (5.0.16p0). This firmware doesn't
know anything about mesh config. However, current code blindly calls
mesh_config when the card is inserted. So check the firmware version before
issuing this command.
Signed-off-by: NHolger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/main.c

@@ -1192,6 +1192,10 @@ int lbs_start_card(struct lbs_private *priv)
 	if (device_create_file(&dev->dev, &dev_attr_lbs_rtap))
 		lbs_pr_err("cannot register lbs_rtap attribute\n");
 
+	lbs_update_channel(priv);
+
+	/* 5.0.16p0 is known to NOT support any mesh */
+	if (priv->fwrelease > 0x05001000) {
 		/* Enable mesh, if supported, and work out which TLV it uses.
 		   0x100 + 291 is an unofficial value used in 5.110.20.pXX
 		   0x100 + 37 is the official value used in 5.110.21.pXX
@@ -1205,7 +1209,6 @@ int lbs_start_card(struct lbs_private *priv)
 		   It's just that 5.110.20.pXX will not have done anything
 		   useful */
 
-	lbs_update_channel(priv);
 		priv->mesh_tlv = 0x100 + 291;
 		if (lbs_mesh_config(priv, 1, priv->curbssparams.channel)) {
 			priv->mesh_tlv = 0x100 + 37;
@@ -1218,6 +1221,7 @@ int lbs_start_card(struct lbs_private *priv)
 			if (device_create_file(&dev->dev, &dev_attr_lbs_mesh))
 				lbs_pr_err("cannot register lbs_mesh attribute\n");
 		}
+	}
 
 	lbs_debugfs_init_one(priv, dev);