gianfar: fix signedness issue

irq_of_parse_and_map() has an unsigned return type.
Testing for a negative error value doesn't work here.

Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 49e4ce1..d1bec62 100644 (file)
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -577,11 +577,10 @@ static int gfar_parse_group(struct device_node *np,
                        irq_of_parse_and_map(np, 1);
                priv->gfargrp[priv->num_grps].interruptError =
                        irq_of_parse_and_map(np,2);
-               if (priv->gfargrp[priv->num_grps].interruptTransmit < 0 ||
-                       priv->gfargrp[priv->num_grps].interruptReceive < 0 ||
-                       priv->gfargrp[priv->num_grps].interruptError < 0) {
+               if (priv->gfargrp[priv->num_grps].interruptTransmit == NO_IRQ ||
+                   priv->gfargrp[priv->num_grps].interruptReceive  == NO_IRQ ||
+                   priv->gfargrp[priv->num_grps].interruptError    == NO_IRQ)
                        return -EINVAL;
-               }
        }
 
        priv->gfargrp[priv->num_grps].grp_id = priv->num_grps;