r8169: fix Config2 MSIEnable bit setting.

commit 2ca6cf06d988fea21e812a86be79353352677c9c upstream.

The MSIEnable bit is only available for the 8169.

Avoid Config2 writes for the post-8169 8168 and 810x.

Reported-by: Su Kang Yin <cantona@cantona.net>
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 0335ab01c9a8ec38b2bf7b263be60c5a648624e1..9f5d8f91cdaa4261cb1b182003c49020f4f9a384 100644 (file)
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -448,7 +448,6 @@ enum rtl_register_content {
        /* Config1 register p.24 */
        LEDS1           = (1 << 7),
        LEDS0           = (1 << 6),
-       MSIEnable       = (1 << 5),     /* Enable Message Signaled Interrupt */
        Speed_down      = (1 << 4),
        MEMMAP          = (1 << 3),
        IOMAP           = (1 << 2),
@@ -456,6 +455,7 @@ enum rtl_register_content {
        PMEnable        = (1 << 0),     /* Power Management Enable */
 
        /* Config2 register p. 25 */
+       MSIEnable       = (1 << 5),     /* 8169 only. Reserved in the 8168. */
        PCI_Clock_66MHz = 0x01,
        PCI_Clock_33MHz = 0x00,
 
@@ -3003,22 +3003,24 @@ static const struct rtl_cfg_info {
 };
 
 /* Cfg9346_Unlock assumed. */
-static unsigned rtl_try_msi(struct pci_dev *pdev, void __iomem *ioaddr,
+static unsigned rtl_try_msi(struct rtl8169_private *tp,
                            const struct rtl_cfg_info *cfg)
 {
+       void __iomem *ioaddr = tp->mmio_addr;
        unsigned msi = 0;
        u8 cfg2;
 
        cfg2 = RTL_R8(Config2) & ~MSIEnable;
        if (cfg->features & RTL_FEATURE_MSI) {
-               if (pci_enable_msi(pdev)) {
-                       dev_info(&pdev->dev, "no MSI. Back to INTx.\n");
+               if (pci_enable_msi(tp->pci_dev)) {
+                       netif_info(tp, hw, tp->dev, "no MSI. Back to INTx.\n");
                } else {
                        cfg2 |= MSIEnable;
                        msi = RTL_FEATURE_MSI;
                }
        }
-       RTL_W8(Config2, cfg2);
+       if (tp->mac_version <= RTL_GIGA_MAC_VER_06)
+               RTL_W8(Config2, cfg2);
        return msi;
 }
 
@@ -3588,7 +3590,7 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
                tp->features |= RTL_FEATURE_WOL;
        if ((RTL_R8(Config5) & (UWF | BWF | MWF)) != 0)
                tp->features |= RTL_FEATURE_WOL;
-       tp->features |= rtl_try_msi(pdev, ioaddr, cfg);
+       tp->features |= rtl_try_msi(tp, cfg);
        RTL_W8(Cfg9346, Cfg9346_Lock);
 
        if ((tp->mac_version <= RTL_GIGA_MAC_VER_06) &&