Hello, Please consider including upstream commit e81107d4c6bd098878af9796b24edc8d4a9524fd in the next v3.13.y-ckt release. This commit was included mainline as of v4.3-rc5. It has been tested and confirmed to resolve http://bugs.launchpad.net/bugs/1512815 . commit e81107d4c6bd098878af9796b24edc8d4a9524fd Author: Kosuke Tatsukawa <tatsu@xxxxxxxxxxxxx> Date: Fri Oct 2 08:27:05 2015 +0000 tty: fix stall caused by missing memory barrier in drivers/tty/n_tty.c Commit e81107d4 does not apply cleanly to v3.13.y-ckt, so I performed a backport, which is in email 1/1. Sincerely, Joseph Salisbury Kosuke Tatsukawa (1): tty: fix stall caused by missing memory barrier in drivers/tty/n_tty.c drivers/tty/n_tty.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) -- 1.9.1 -- 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