usb-serial: don't release unregistered minors
authorAlan Stern <stern@rowland.harvard.edu>
Tue, 29 Jul 2008 16:01:04 +0000 (12:01 -0400)
committerGreg Kroah-Hartman <gregkh@suse.de>
Thu, 14 Aug 2008 00:32:50 +0000 (17:32 -0700)
commit0282b7f2a874e72c18fcd5a112ccf67f71ba7f5c
tree85db6db24e0ee5d8c018fa9b58a720d3da521b64
parente67d70f2f55d90c79dcb384ad5b798f0f9a68085
usb-serial: don't release unregistered minors

This patch (as1121) fixes a bug in the USB serial core.  When a device
is unregistered, the core will give back its minors -- even if the
device hasn't been assigned any!

The patch reserves the highest minor value (255) to mean that no minor
was assigned.  It also removes some dead code and does a small style
fixup.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/serial/usb-serial.c
include/linux/usb/serial.h