r8169: don't use MSI before RTL8168d

It was reported that after resuming from suspend network fails with
error "do_IRQ: 3.38 No irq handler for vector", see [0]. Enabling WoL
can work around the issue, but the only actual fix is to disable MSI.
So let's mimic the behavior of the vendor driver and disable MSI on
all chip versions before RTL8168d.

[0] https://bugzilla.kernel.org/show_bug.cgi?id=204079

Fixes: 6c6aa15fdea5 ("r8169: improve interrupt handling")
Reported-by: Dušan Dragić <dragic.dusan@gmail.com>
Tested-by: Dušan Dragić <dragic.dusan@gmail.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index a71dd66..e1dd6ea 100644 (file)
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -6586,13 +6586,18 @@ static int rtl_alloc_irq(struct rtl8169_private *tp)
 {
        unsigned int flags;
 
-       if (tp->mac_version <= RTL_GIGA_MAC_VER_06) {
+       switch (tp->mac_version) {
+       case RTL_GIGA_MAC_VER_02 ... RTL_GIGA_MAC_VER_06:
                rtl_unlock_config_regs(tp);
                RTL_W8(tp, Config2, RTL_R8(tp, Config2) & ~MSIEnable);
                rtl_lock_config_regs(tp);
+               /* fall through */
+       case RTL_GIGA_MAC_VER_07 ... RTL_GIGA_MAC_VER_24:
                flags = PCI_IRQ_LEGACY;
-       } else {
+               break;
+       default:
                flags = PCI_IRQ_ALL_TYPES;
+               break;
        }
 
        return pci_alloc_irq_vectors(tp->pci_dev, 1, 1, flags);