gianfar: Fix a filer bug

We need to enable filer whenever we need to use multiple RX
queues. Also, need to program RIR0 register with the required
distribution we require, if using RX filer hashing support for
packet distribution to multiple queues.
Signed-off-by: Sandeep Gopalpet <Sandeep.Kumar@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/gianfar.c

@@ -357,8 +357,11 @@ static void gfar_init_mac(struct net_device *ndev)
 	/* Configure the coalescing support */
 	gfar_configure_coalescing(priv, 0xFF, 0xFF);
 
-	if (priv->rx_filer_enable)
+	if (priv->rx_filer_enable) {
 		rctrl |= RCTRL_FILREN;
+		/* Program the RIR0 reg with the required distribution */
+		gfar_write(&regs->rir0, DEFAULT_RIR0);
+	}
 
 	if (priv->rx_csum_enable)
 		rctrl |= RCTRL_CHECKSUMMING;
@@ -1022,6 +1025,9 @@ static int gfar_probe(struct of_device *ofdev,
 		priv->rx_queue[i]->rxic = DEFAULT_RXIC;
 	}
 
+	/* enable filer if using multiple RX queues*/
+	if(priv->num_rx_queues > 1)
+		priv->rx_filer_enable = 1;
 	/* Enable most messages by default */
 	priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
 

drivers/net/gianfar.h

@@ -401,6 +401,10 @@ extern const char gfar_driver_version[];
 #define FPR_FILER_MASK	0xFFFFFFFF
 #define MAX_FILER_IDX	0xFF
 
+/* This default RIR value directly corresponds
+ * to the 3-bit hash value generated */
+#define DEFAULT_RIR0	0x05397700
+
 /* RQFCR register bits */
 #define RQFCR_GPI		0x80000000
 #define RQFCR_HASHTBL_Q		0x00000000