be2net: do not modify PCI MaxReadReq size

Setting the PCI MRRS to a value of 4096 (overriding the system decided
value) had provided perf improvement in TX.
But, IBM has provided feedback that on POWER platforms, this value is set
by the system firmware, and drivers modifying this value can cause
unpredictable results (like EEH errors.) So, backing off this change.
On POWER7 platforms most slots, it seems, do get a MRRS of 4096.

This patch reverts the following commit:
"be2net: Modified PCI MaxReadReq size to 4096 bytes"
commit 5a56eb10babbcd7b3796dc3c28c271260aa3608d.

Suggested-by: Brian King <bjking1@us.ibm.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index 2c486865a3cc26a7eb49e7cfd9459e5943243072..32867dfc0d3512df92650d69174fee14345a5698 100644 (file)
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -2728,8 +2728,6 @@ static int be_setup(struct be_adapter *adapter)
                be_cmd_set_flow_control(adapter, adapter->tx_fc,
                                        adapter->rx_fc);
 
-       pcie_set_readrq(adapter->pdev, 4096);
-
        if (be_physfn(adapter) && num_vfs) {
                if (adapter->dev_num_vfs)
                        be_vf_setup(adapter);