tg3: Disable unused transmit rings

This patch allows the driver to disable the additional transmit rings
available on the 5717 and 5719 devices.  This is not strictly necessary,
but is done anyways for correctness.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 978ba5d8c25..1c680ff5101 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -7536,6 +7536,9 @@ static void tg3_rings_reset(struct tg3 *tp)
         /* Disable all transmit rings but the first. */
         if (!(tp->tg3_flags2 & TG3_FLG2_5705_PLUS))
                 limit = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE * 16;
+        else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717 ||
+                 GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719)
+                limit = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE * 4;
         else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765)
                 limit = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE * 2;
         else