This is a note to let you know that I've just added the patch titled

tg3: Enable PHY reset in MTU change path for 5720

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: tg3-enable-phy-reset-in-mtu-change-path-for-5720.patch and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Wed Feb 28 16:19:30 CET 2018

From: Siva Reddy Kallam siva.kallam@broadcom.com Date: Fri, 22 Dec 2017 16:05:29 +0530 Subject: tg3: Enable PHY reset in MTU change path for 5720

From: Siva Reddy Kallam siva.kallam@broadcom.com

[ Upstream commit e60ee41aaf898584205a6af5c996860d0fe6a836 ]

A customer noticed RX path hang when MTU is changed on the fly while running heavy traffic with NCSI enabled for 5717 and 5719. Since 5720 belongs to same ASIC family, we observed same issue and same fix could solve this problem for 5720.

Signed-off-by: Siva Reddy Kallam siva.kallam@broadcom.com Signed-off-by: Michael Chan michael.chan@broadcom.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/broadcom/tg3.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -14240,7 +14240,8 @@ static int tg3_change_mtu(struct net_dev */ if (tg3_asic_rev(tp) == ASIC_REV_57766 || tg3_asic_rev(tp) == ASIC_REV_5717 || - tg3_asic_rev(tp) == ASIC_REV_5719) + tg3_asic_rev(tp) == ASIC_REV_5719 || + tg3_asic_rev(tp) == ASIC_REV_5720) reset_phy = true;

err = tg3_restart_hw(tp, reset_phy);

Patches currently in stable-queue which might be from siva.kallam@broadcom.com are

queue-4.4/tg3-enable-phy-reset-in-mtu-change-path-for-5720.patch queue-4.4/tg3-add-workaround-to-restrict-5762-mrrs-to-2048.patch