[patch 31/54] TG3: Fix link problem on Dells onboard 5906.

[Chris Wright]

-stable review patch.  If anyone has any objections, please let us know.
---------------------

From:  <mchan@xxxxxxxxxxxx>

The bug is caused by code that always set
(TG3_FLAG_USE_MI_INTERRUPT | TG3_FLAG_USE_LINKCHG_REG) on all Dell's
onboard devices.  With these 2 flags set, the link status is polled
by tg3_timer() and will only work when the PHY is set up to interrupt
the MAC on link changes.  This breaks 5906 because the 5906 PHY does
not support TG3_FLAG_USE_MI_INTERRUPT the same as other PHYs.

For correctness, only 5701 on Dell systems needs these 2 flags to be
set.  This change will fix the 5906 problem and will change other
Dell devices except 5700 and 5701 to use the more efficient
interrupt-driven link changes.

Update version to 3.75.2.

Signed-off-by: Michael Chan <mchan@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/net/tg3.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- linux-2.6.21.4.orig/drivers/net/tg3.c
+++ linux-2.6.21.4/drivers/net/tg3.c
@@ -64,8 +64,8 @@
 
 #define DRV_MODULE_NAME		"tg3"
 #define PFX DRV_MODULE_NAME	": "
-#define DRV_MODULE_VERSION	"3.75.1"
-#define DRV_MODULE_RELDATE	"May 7, 2007"
+#define DRV_MODULE_VERSION	"3.75.2"
+#define DRV_MODULE_RELDATE	"June 5, 2007"
 
 #define TG3_DEF_MAC_MODE	0
 #define TG3_DEF_RX_MODE		0
@@ -10942,6 +10942,7 @@ static int __devinit tg3_get_invariants(
 	 * upon subsystem IDs.
 	 */
 	if (tp->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
+	    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5701 &&
 	    !(tp->tg3_flags2 & TG3_FLG2_PHY_SERDES)) {
 		tp->tg3_flags |= (TG3_FLAG_USE_MI_INTERRUPT |
 				  TG3_FLAG_USE_LINKCHG_REG);

-- 
-
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