[PATCH] net: macb: constify macb configuration data

[Josh Cartwright <joshc@ni.com>]

The configurations are not modified by the driver.  Make them 'const' so
that they may be placed in a read-only section.

Signed-off-by: Josh Cartwright <joshc@ni.com>
---
 drivers/net/ethernet/cadence/macb.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index 1fe8b94..2c30572 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -2131,17 +2131,17 @@ static const struct net_device_ops macb_netdev_ops = {
 };
 
 #if defined(CONFIG_OF)
-static struct macb_config pc302gem_config = {
+static const struct macb_config pc302gem_config = {
 	.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
 	.dma_burst_length = 16,
 };
 
-static struct macb_config sama5d3_config = {
+static const struct macb_config sama5d3_config = {
 	.caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
 	.dma_burst_length = 16,
 };
 
-static struct macb_config sama5d4_config = {
+static const struct macb_config sama5d4_config = {
 	.caps = 0,
 	.dma_burst_length = 4,
 };
@@ -2172,7 +2172,7 @@ static void macb_configure_caps(struct macb *bp)
 	if (bp->pdev->dev.of_node) {
 		match = of_match_node(macb_dt_ids, bp->pdev->dev.of_node);
 		if (match && match->data) {
-			config = (const struct macb_config *)match->data;
+			config = match->data;
 
 			bp->caps = config->caps;
 			/*
-- 
2.3.2