path: root/drivers/net/ethernet/broadcom/tg3.c
diff options
authorBrian King <brking@linux.vnet.ibm.com>2017-12-15 15:21:50 -0600
committerDavid S. Miller <davem@davemloft.net>2017-12-19 10:23:54 -0500
commit748a240c589824e9121befb1cba5341c319885bc (patch)
treeb4c3830335066e22c2f10668cf4783891dbb967c /drivers/net/ethernet/broadcom/tg3.c
parentMerge tag 'mac80211-for-davem-2017-12-19' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 (diff)
tg3: Fix rx hang on MTU change with 5717/5719
This fixes a hang issue seen when changing the MTU size from 1500 MTU to 9000 MTU on both 5717 and 5719 chips. In discussion with Broadcom, they've indicated that these chipsets have the same phy as the 57766 chipset, so the same workarounds apply. This has been tested by IBM on both Power 8 and Power 9 systems as well as by Broadcom on x86 hardware and has been confirmed to resolve the hang issue. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom/tg3.c')
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index de51c2177d03..d09c5a9c53b5 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -14225,7 +14225,9 @@ static int tg3_change_mtu(struct net_device *dev, int new_mtu)
/* Reset PHY, otherwise the read DMA engine will be in a mode that
* breaks all requests to 256 bytes.
- if (tg3_asic_rev(tp) == ASIC_REV_57766)
+ if (tg3_asic_rev(tp) == ASIC_REV_57766 ||
+ tg3_asic_rev(tp) == ASIC_REV_5717 ||
+ tg3_asic_rev(tp) == ASIC_REV_5719)
reset_phy = true;
err = tg3_restart_hw(tp, reset_phy);