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USB: serial: don't call release without attach

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This patch (as1295) fixes a recently-added bug in the USB serial core.
If certain kinds of errors occur during probing, the core may call a
serial driver's release method without previously calling the attach
method.  This causes some drivers (io_ti in particular) to perform an
invalid memory access.

The patch adds a new flag to keep track of whether or not attach has
been called.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Jean-Denis Girard <jd.girard@sysnux.pf>
CC: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2009-10-09 12:43:12 -04:00
committed by Greg Kroah-Hartman
parent ba6b702f85
commit a4720c650b
2 changed files with 6 additions and 1 deletions
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1
include/linux/usb/serial.h
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@ -150,6 +150,7 @@ struct usb_serial {
struct usb_interface *interface;
unsigned char disconnected:1;
unsigned char suspending:1;
unsigned char attached:1;
unsigned char minor;
unsigned char num_ports;
unsigned char num_port_pointers;