[PATCH] e1000: Ethtool set speed/duplex validates parameters for consistency

[firefly-linux-kernel-4.4.55.git] / drivers / net / e1000 / e1000_main.c

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index d59f75b7bf167a3a0367353e37ffa4b1de9d20c8..f680c87254ba4f00723cfa09e6f64029a7e81bbf 100644 (file)
--- 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;