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USB: ipaq: fix oops when device is plugged in 

This patch (as1293) fixes a problem with the ipaq serial driver.  It
tries to bind to all the interfaces, even those that don't have enough
endpoints.  The symptom is an invalid memory reference and oops when
the device is plugged in.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: stable <stable@kernel.org>
Tested-by: Matthias Geissert <geissert@mathematik.tu-darmstadt.de>
Tested-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2009-10-05 15:53:58 -04:00 committed by Greg Kroah-Hartman
parent b0a9cf297e
commit 06bad89da6
1 changed files with 9 additions and 0 deletions
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9
drivers/usb/serial/ipaq.c
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@ -966,6 +966,15 @@ static int ipaq_calc_num_ports(struct usb_serial *serial)
static int ipaq_startup(struct usb_serial *serial)
{
dbg("%s", __func__);
/* Some of the devices in ipaq_id_table[] are composite, and we
* shouldn't bind to all the interfaces. This test will rule out
* some obviously invalid possibilities.
*/
if (serial->num_bulk_in < serial->num_ports ||
serial->num_bulk_out < serial->num_ports)
return -ENODEV;
if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
/*
* FIXME: HP iPaq rx3715, possibly others, have 1 config that