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staging: ozwpan: Fixes crash due to invalid port aceess. 

This patch fixes kernel crash issue, when we receive URB request
after de-enumerating device.

Signed-off-by: Rupesh Gujare <rupesh.gujare@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rupesh Gujare 2013-08-05 18:40:12 +01:00 committed by Greg Kroah-Hartman
parent b2271b5bdf
commit bc9aece00a
1 changed files with 7 additions and 2 deletions
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9
drivers/staging/ozwpan/ozhcd.c
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@ -480,10 +480,14 @@ static int oz_enqueue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir,
oz_free_urb_link(urbl);
return 0;
}
if (in_dir)
if (in_dir && port->in_ep[ep_addr])
ep = port->in_ep[ep_addr];
else
else if (!in_dir && port->out_ep[ep_addr])
ep = port->out_ep[ep_addr];
else {
err = -ENOMEM;
goto out;
}
/*For interrupt endpoint check for buffered data
* & complete urb
@ -505,6 +509,7 @@ static int oz_enqueue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir,
} else {
err = -EPIPE;
}
out:
spin_unlock_bh(&port->ozhcd->hcd_lock);
if (err)
oz_free_urb_link(urbl);