From: Nithin Sujir <nsujir@xxxxxxxxxxxx> This patch has been added to the 3.12 stable tree. If you have any objections, please let us know. =============== [ Upstream commit c6993dfd7db9b0c6b7ca7503a56fda9236a4710f ] Quoting David Vrabel - "5780 cards cannot have jumbo frames and TSO enabled together. When jumbo frames are enabled by setting the MTU, the TSO feature must be cleared. This is done indirectly by calling netdev_update_features() which will call tg3_fix_features() to actually clear the flags. netdev_update_features() will also trigger a new netlink message for the feature change event which will result in a call to tg3_get_stats64() which deadlocks on the tg3 lock." tg3_set_mtu() does not need to be under the tg3 lock since converting the flags to use set_bit(). Move it out to after tg3_netif_stop(). Reported-by: David Vrabel <david.vrabel@xxxxxxxxxx> Tested-by: David Vrabel <david.vrabel@xxxxxxxxxx> Signed-off-by: Michael Chan <mchan@xxxxxxxxxxxx> Signed-off-by: Nithin Nayak Sujir <nsujir@xxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> --- drivers/net/ethernet/broadcom/tg3.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 3ff1f272c6c8..c0acf98d1ea5 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -13956,12 +13956,12 @@ static int tg3_change_mtu(struct net_device *dev, int new_mtu) tg3_netif_stop(tp); + tg3_set_mtu(dev, tp, new_mtu); + tg3_full_lock(tp, 1); tg3_halt(tp, RESET_KIND_SHUTDOWN, 1); - tg3_set_mtu(dev, tp, new_mtu); - /* Reset PHY, otherwise the read DMA engine will be in a mode that * breaks all requests to 256 bytes. */ -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html