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

Chris Wright
2007-06-08T07:50:53Z

[-- Attachment #1: tg3-fix-link-problem-on-dell-s-onboard-5906.patch --]
[-- Type: text/plain, Size: 1783 bytes --]

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

From: <mchan@broadcom.com>

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@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
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);

--