tg3: Disable new DMA engine for 57766

A bug was found in the new DMA engine for the 57766.  This patch
disables it, which causes the device to fallback to the old DMA engine.

(cherry picked from commit 3906969189a409e590a51b18c86a92d0506c9372)
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Joe Jin <joe.jin@oracle.com>

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 18524f99a2fca2c4155b89d7413ffe2da10071ea..454b3c5aea0fbdea1506d2bde44f4b4dd30979d6 100644 (file)
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8902,9 +8902,6 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
        if (tg3_flag(tp, PCI_EXPRESS))
                rdmac_mode |= RDMAC_MODE_FIFO_LONG_BURST;
 
-       if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57766)
-               rdmac_mode |= RDMAC_MODE_JMB_2K_MMRR;
-
        if (tg3_flag(tp, HW_TSO_1) ||
            tg3_flag(tp, HW_TSO_2) ||
            tg3_flag(tp, HW_TSO_3))
@@ -14195,8 +14192,6 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
 
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719)
                tp->dma_limit = TG3_TX_BD_DMA_MAX_4K;
-       else if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57766)
-               tp->dma_limit = TG3_TX_BD_DMA_MAX_2K;
 
        if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717 ||
            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719 ||