[TG3]: Fix performance regression on 5705.

A performance regression was introduced by the following commit:

    commit ee6a99b539a50b4e9398938a0a6d37f8bf911550
    Author: Michael Chan <mchan@broadcom.com>
    Date:   Wed Jul 18 21:49:10 2007 -0700

    [TG3]: Fix msi issue with kexec/kdump.

In making that change, the PCI latency timer and cache line size
registers were not restored after chip reset.  On the 5705, the
latency timer gets reset to 0 during chip reset and this causes
very poor performance.

Update version to 3.84.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 30b1cca8144ce360b23db4106983fb9c1cf45822..b9e1dc6623639ba308e85f2de047864d8a19cfbb 100644 (file)
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -64,8 +64,8 @@
 
 #define DRV_MODULE_NAME                "tg3"
 #define PFX DRV_MODULE_NAME    ": "
-#define DRV_MODULE_VERSION     "3.83"
-#define DRV_MODULE_RELDATE     "October 10, 2007"
+#define DRV_MODULE_VERSION     "3.84"
+#define DRV_MODULE_RELDATE     "October 12, 2007"
 
 #define TG3_DEF_MAC_MODE       0
 #define TG3_DEF_RX_MODE                0
@@ -5056,6 +5056,12 @@ static void tg3_restore_pci_state(struct tg3 *tp)
 
        pci_write_config_dword(tp->pdev, TG3PCI_COMMAND, tp->pci_cmd);
 
+       if (!(tp->tg3_flags2 & TG3_FLG2_PCI_EXPRESS)) {
+               pci_write_config_byte(tp->pdev, PCI_CACHE_LINE_SIZE,
+                                     tp->pci_cacheline_sz);
+               pci_write_config_byte(tp->pdev, PCI_LATENCY_TIMER,
+                                     tp->pci_lat_timer);
+       }
        /* Make sure PCI-X relaxed ordering bit is clear. */
        if (tp->pcix_cap) {
                u16 pcix_cmd;