| Message ID | 14b4a80a-fb2c-f669-be09-4092bfc6cd57@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | r8169: refactor and improve interrupt coalescing | expand |
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c index 3fef1b254..0ac3976e3 100644 --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -1908,6 +1908,11 @@ static int rtl_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec) if (tx_fr == 1) tx_fr = 0; + /* HW requires time limit to be set if frame limit is set */ + if ((tx_fr && !ec->tx_coalesce_usecs) || + (rx_fr && !ec->rx_coalesce_usecs)) + return -EINVAL; + w |= FIELD_PREP(RTL_COALESCE_TX_FRAMES, DIV_ROUND_UP(tx_fr, 4)); w |= FIELD_PREP(RTL_COALESCE_RX_FRAMES, DIV_ROUND_UP(rx_fr, 4));
Realtek provided information about a HW constraint that time limit must not be set to 0 if the frame limit is >0. Add a check for this and reject invalid parameter combinations. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> --- drivers/net/ethernet/realtek/r8169_main.c | 5 +++++ 1 file changed, 5 insertions(+)