diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index ca6b3cbf44d5a160d4eedca0def96e442ecb2042..4dc07564e1412535c7f21cf651d1209b9c1cf586 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8206,6 +8206,10 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
 	    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57780 ||
 	    (tp->tg3_flags3 & TG3_FLG3_5717_PLUS)) {
 		val = tr32(TG3_RDMA_RSRVCTRL_REG);
+		if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5719) {
+			val &= ~TG3_RDMA_RSRVCTRL_TXMRGN_MASK;
+			val |= TG3_RDMA_RSRVCTRL_TXMRGN_320B;
+		}
 		tw32(TG3_RDMA_RSRVCTRL_REG,
 		     val | TG3_RDMA_RSRVCTRL_FIFO_OFLW_FIX);
 	}
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 4a1974804b9fcd0c6531c86f899c03834d0061db..06a4e7e8fff395d9041487b3c249d33728b9efee 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -1327,6 +1327,8 @@
 
 #define TG3_RDMA_RSRVCTRL_REG		0x00004900
 #define TG3_RDMA_RSRVCTRL_FIFO_OFLW_FIX	 0x00000004
+#define TG3_RDMA_RSRVCTRL_TXMRGN_320B	 0x28000000
+#define TG3_RDMA_RSRVCTRL_TXMRGN_MASK	 0xffe00000
 /* 0x4904 --> 0x4910 unused */
 
 #define TG3_LSO_RD_DMA_CRPTEN_CTRL	0x00004910