request for 4.4-stable: d733f7542ad4 ("drivers: net: cpsw: fix segfault in case of bad phy-handle")

Hi Greg,

This patch is not marked for 4.4-stable, but it's already in 4.9 and 4.14 stable.

Please apply to 4.4-stable.

This patch adds error handling to avoid segfault situation, I've tweaked patch to use original print function of dev_info() instead of phy_attached_info() which is in commit 2220943a21e26d97d7fd8f83c004b947326b469d upstream.