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-rw-r--r--drivers/net/e1000/e1000_main.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index d59f75b7bf1..f680c87254b 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -3617,6 +3617,13 @@ e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
{
adapter->hw.autoneg = 0;
+ /* Fiber NICs only allow 1000 gbps Full duplex */
+ if((adapter->hw.media_type == e1000_media_type_fiber) &&
+ spddplx != (SPEED_1000 + DUPLEX_FULL)) {
+ DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
+ return -EINVAL;
+ }
+
switch(spddplx) {
case SPEED_10 + DUPLEX_HALF:
adapter->hw.forced_speed_duplex = e1000_10_half;