[PATCH for-3.18 3/5] bgmac: reset & enable Ethernet core before using it

Amit Pundir
2017-07-04T11:44:45Z

From: Rafał Miłecki <zajec5@gmail.com>

commit b4dfd8e92956b396d3438212bc9a0be6267b8b34 upstream.

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: Amit Pundir <amit.pundir@linaro.org>
---
To be cherry-picked on linux-4.4.y as well.

drivers/net/ethernet/broadcom/bgmac.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index 54a7da860a2d..2b58df0c4f48 100644
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -1438,6 +1438,11 @@ 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)
--
2.7.4