tree 3756a471443f4393d8486460ab8ff1472460b56c
parent e1533c46151cedb8904f3f88d6c2fc0753e46c0f
author Johan Hovold <johan@kernel.org> 1487959888 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1489835666 +0800

USB: serial: digi_acceleport: fix OOB-event processing

commit 2e46565cf622dd0534a9d8bffe152a577b48d7aa upstream.

A recent change claimed to fix an off-by-one error in the OOB-port
completion handler, but instead introduced such an error. This could
specifically led to modem-status changes going unnoticed, effectively
breaking TIOCMGET.

Note that the offending commit fixes a loop-condition underflow and is
marked for stable, but should not be backported without this fix.

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Fixes: 2d380889215f ("USB: serial: digi_acceleport: fix OOB data sanity
check")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>