USB: serial: digi_acceleport: fix OOB-event processing
authorJohan Hovold <johan@kernel.org>
Fri, 24 Feb 2017 18:11:28 +0000 (19:11 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 9 Mar 2017 09:34:16 +0000 (10:34 +0100)
commit2f6821462fe3ace62df3f1b5a9463153e8288298
tree432ad882afe50919d896e3747971c60dceb26b57
parent829b84db0c0c120ae5855a69cc0c94ff75fafabb
USB: serial: digi_acceleport: fix OOB-event processing

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")
Cc: stable <stable@vger.kernel.org> # v2.6.30
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/serial/digi_acceleport.c