tg3: Disable EEE during loopback tests
EEE interferes with the hardware's ability to loop a packet back to the
host. This patch disables the feature for the duration of the test.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-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 f52466d..c333481 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -11013,14 +11013,19 @@
static int tg3_test_loopback(struct tg3 *tp)
{
int err = 0;
- u32 cpmuctrl = 0;
+ u32 eee_cap, cpmuctrl = 0;
if (!netif_running(tp->dev))
return TG3_LOOPBACK_FAILED;
+ eee_cap = tp->phy_flags & TG3_PHYFLG_EEE_CAP;
+ tp->phy_flags &= ~TG3_PHYFLG_EEE_CAP;
+
err = tg3_reset_hw(tp, 1);
- if (err)
- return TG3_LOOPBACK_FAILED;
+ if (err) {
+ err = TG3_LOOPBACK_FAILED;
+ goto done;
+ }
/* Turn off gphy autopowerdown. */
if (tp->phy_flags & TG3_PHYFLG_ENABLE_APD)
@@ -11040,8 +11045,10 @@
udelay(10);
}
- if (status != CPMU_MUTEX_GNT_DRIVER)
- return TG3_LOOPBACK_FAILED;
+ if (status != CPMU_MUTEX_GNT_DRIVER) {
+ err = TG3_LOOPBACK_FAILED;
+ goto done;
+ }
/* Turn off link-based power management. */
cpmuctrl = tr32(TG3_CPMU_CTRL);
@@ -11070,6 +11077,9 @@
if (tp->phy_flags & TG3_PHYFLG_ENABLE_APD)
tg3_phy_toggle_apd(tp, true);
+done:
+ tp->phy_flags |= eee_cap;
+
return err;
}