kernel: bgmac: fix regression in MII registration

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

target/linux/generic/patches-4.4/170-net-bgmac-fix-reversed-check-for-MII-registration-er.patch

@@ -0,0 +1,29 @@
+From 031d3de673a8bc0b7b4183ba3898a0abd803920a Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Wed, 17 Aug 2016 15:31:59 +0200
+Subject: [PATCH net] net: bgmac: fix reversed check for MII registration error
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+It was failing on successful registration returning meaningless errors.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Fixes: 55954f3bfdac ("net: ethernet: bgmac: move BCMA MDIO Phy code into a separate file")
+---
+This fix is intendent for net repository (4.8 release).
+---
+ drivers/net/ethernet/broadcom/bgmac-bcma.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/net/ethernet/broadcom/bgmac-bcma.c
++++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c
+@@ -159,7 +159,7 @@ static int bgmac_probe(struct bcma_devic
+ 
+ 	if (!bgmac_is_bcm4707_family(core)) {
+ 		mii_bus = bcma_mdio_mii_register(core, bgmac->phyaddr);
+-		if (!IS_ERR(mii_bus)) {
++		if (IS_ERR(mii_bus)) {
+ 			err = PTR_ERR(mii_bus);
+ 			goto err;
+ 		}