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tg3: Disable EEE during loopback tests

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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>
This commit is contained in:
Matt Carlson 2011-01-25 15:58:54 +00:00 committed by David S. Miller
parent aba49f2421
commit ab78904608
1 changed files with 15 additions and 5 deletions
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20
drivers/net/tg3.c
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@ -11013,14 +11013,19 @@ out:
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 @@ static int tg3_test_loopback(struct tg3 *tp)
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 @@ static int tg3_test_loopback(struct tg3 *tp)
if (tp->phy_flags & TG3_PHYFLG_ENABLE_APD)
tg3_phy_toggle_apd(tp, true);
done:
tp->phy_flags |= eee_cap;
return err;
}