bnx2x: fix ring size for 10G functions

Commit d760fc37 caused
1G functions to allocate rx rings which were 1/10 of the
size of 10G functions' rx rings.

However, it also caused 10G functions on 5771x boards to
allocate small rings, which limits their possible (default)
rx throughput. This patch causes all 10G functions to use
rings of intended length by default.
Signed-off-by: NYuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: NAriel Elior <ariele@broadcom.com>
Signed-off-by: NEilon Greenstein <eilong@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c

@@ -3523,15 +3523,18 @@ static int bnx2x_alloc_fp_mem_at(struct bnx2x *bp, int index)
 	} else
 #endif
 	if (!bp->rx_ring_size) {
-		u32 cfg = SHMEM_RD(bp,
-			     dev_info.port_hw_config[BP_PORT(bp)].default_cfg);
-
 		rx_ring_size = MAX_RX_AVAIL/BNX2X_NUM_RX_QUEUES(bp);
 
-		/* Dercease ring size for 1G functions */
+		if (CHIP_IS_E3(bp)) {
+			u32 cfg = SHMEM_RD(bp,
+					   dev_info.port_hw_config[BP_PORT(bp)].
+					   default_cfg);
+
+			/* Decrease ring size for 1G functions */
 			if ((cfg & PORT_HW_CFG_NET_SERDES_IF_MASK) ==
 			    PORT_HW_CFG_NET_SERDES_IF_SGMII)
 				rx_ring_size /= 10;
+		}
 
 		/* allocate at least number of buffers required by FW */
 		rx_ring_size = max_t(int, bp->disable_tpa ? MIN_RX_SIZE_NONTPA :