bgmac: reset & enable Ethernet core before using it

[ Upstream commit b4dfd8e92956b396d3438212bc9a0be6267b8b34 ]

This fixes Ethernet on D-Link DIR-885L with BCM47094 SoC. Felix reported
similar fix was needed for his BCM4709 device (Buffalo WXR-1900DHP?).
I tested this for regressions on BCM4706, BCM4708A0 and BCM47081A0.

Cc: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>

diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index 1efec51c65b060b478f8cded69548be09896de8b..6f0aad85c5242e14c405e3714dacb0934ef60856 100644 (file)
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -1571,6 +1571,11 @@ static int bgmac_probe(struct bcma_device *core)
                dev_warn(&core->dev, "Using random MAC: %pM\n", mac);
        }
 
+       /* This (reset &) enable is not preset in specs or reference driver but
+        * Broadcom does it in arch PCI code when enabling fake PCI device.
+        */
+       bcma_core_enable(core, 0);
+
        /* Allocation and references */
        net_dev = alloc_etherdev(sizeof(*bgmac));
        if (!net_dev)