r8169: re-enable MSI on RTL8168c

[ Upstream commit 99a03ba76e890dccd5a604c4718a4608e1c4bc48 ]

The original change fixed an issue on RTL8168b by mimicking the vendor
driver behavior to disable MSI on chip versions before RTL8168d.
This however now caused an issue on a system with RTL8168c, see [0].
Therefore leave MSI disabled on RTL8168b, but re-enable it on RTL8168c.

[0] https://bugzilla.redhat.com/show_bug.cgi?id=1792839

Fixes: 2c3451b113cc ("r8169: don't use MSI before RTL8168d")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index a2cef6a004e730a46f430e5ab75b127bba53d6dd..238c5456bc0922ea7e253275c0222a56f51741db 100644 (file)
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -6812,7 +6812,7 @@ static int rtl_alloc_irq(struct rtl8169_private *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:
+       case RTL_GIGA_MAC_VER_07 ... RTL_GIGA_MAC_VER_17:
                flags = PCI_IRQ_LEGACY;
                break;
        default: