From: Johan Hovold <johan@kernel.org>
Date: Fri, 24 Feb 2017 18:11:28 +0000 (+0100)
Subject: USB: serial: digi_acceleport: fix OOB-event processing
X-Git-Tag: v3.2.89~70
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9a1f83c1a55eb363f6e09c5fbe27254329c3ae1a;p=pandora-kernel.git

USB: serial: digi_acceleport: fix OOB-event processing

commit 2f6821462fe3ace62df3f1b5a9463153e8288298 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>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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