tg3: Fix for diasllow rx coalescing time to be 0

When the rx coalescing time is 0, interrupts
are not generated from the controller and rx path hangs.
To avoid this rx hang, updating the driver to not allow
rx coalescing time to be 0.

Signed-off-by: Satish Baddipadige <satish.baddipadige@broadcom.com>
Signed-off-by: Siva Reddy Kallam <siva.kallam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index ff300f7cf5295fc0d4f1e1b0692d74e6a6091912..f3c6c915e423502cea0e6db2dcb25343e09ae00e 100644 (file)
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -14014,6 +14014,7 @@ static int tg3_set_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
        }
 
        if ((ec->rx_coalesce_usecs > MAX_RXCOL_TICKS) ||
+           (!ec->rx_coalesce_usecs) ||
            (ec->tx_coalesce_usecs > MAX_TXCOL_TICKS) ||
            (ec->rx_max_coalesced_frames > MAX_RXMAX_FRAMES) ||
            (ec->tx_max_coalesced_frames > MAX_TXMAX_FRAMES) ||