[PATCH 5.11 115/122] r8169: tweak max read request size for newer chips also in jumbo mtu mode

Greg Kroah-Hartman
2021-04-19T13:16:55Z

From: Heiner Kallweit <hkallweit1@gmail.com>

[ Upstream commit 5e00e16cb98935bcf06f51931876d898c226f65c ]

So far we don't increase the max read request size if we switch to
jumbo mode before bringing up the interface for the first time.
Let's change this.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/realtek/r8169_main.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index 7c1a057dcf3d..47a4ff832d75 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -2342,13 +2342,14 @@ static void r8168b_1_hw_jumbo_disable(struct rtl8169_private *tp)
static void rtl_jumbo_config(struct rtl8169_private *tp)
{
bool jumbo = tp->dev->mtu > ETH_DATA_LEN;
+ int readrq = 4096;

rtl_unlock_config_regs(tp);
switch (tp->mac_version) {
case RTL_GIGA_MAC_VER_12:
case RTL_GIGA_MAC_VER_17:
if (jumbo) {
- pcie_set_readrq(tp->pci_dev, 512);
+ readrq = 512;
r8168b_1_hw_jumbo_enable(tp);
} else {
r8168b_1_hw_jumbo_disable(tp);
@@ -2356,7 +2357,7 @@ static void rtl_jumbo_config(struct rtl8169_private *tp)
break;
case RTL_GIGA_MAC_VER_18 ... RTL_GIGA_MAC_VER_26:
if (jumbo) {
- pcie_set_readrq(tp->pci_dev, 512);
+ readrq = 512;
r8168c_hw_jumbo_enable(tp);
} else {
r8168c_hw_jumbo_disable(tp);
@@ -2381,8 +2382,8 @@ static void rtl_jumbo_config(struct rtl8169_private *tp)
}
rtl_lock_config_regs(tp);

- if (!jumbo && pci_is_pcie(tp->pci_dev) && tp->supports_gmii)
- pcie_set_readrq(tp->pci_dev, 4096);
+ if (pci_is_pcie(tp->pci_dev) && tp->supports_gmii)
+ pcie_set_readrq(tp->pci_dev, readrq);
}

DECLARE_RTL_COND(rtl_chipcmd_cond)
--
2.30.2