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io_edgeport: Fix various bogus returns to the tty layer 

The edgeport reports negative error codes to functions that do not
expect them. This can cause ports to jam forever

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-07-22 11:16:42 +01:00 committed by Linus Torvalds
parent 03f0dbf74c
commit d76f2f4462
1 changed files with 6 additions and 6 deletions
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12
drivers/usb/serial/io_edgeport.c
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@ -1404,15 +1404,15 @@ static int edge_write_room(struct tty_struct *tty)
dbg("%s", __func__);
if (edge_port == NULL)
return -ENODEV;
return 0;
if (edge_port->closePending)
return -ENODEV;
return 0;
dbg("%s - port %d", __func__, port->number);
if (!edge_port->open) {
dbg("%s - port not opened", __func__);
return -EINVAL;
return 0;
}
/* total of both buffers is still txCredit */
@ -1444,13 +1444,13 @@ static int edge_chars_in_buffer(struct tty_struct *tty)
dbg("%s", __func__);
if (edge_port == NULL)
return -ENODEV;
return 0;
if (edge_port->closePending)
return -ENODEV;
return 0;
if (!edge_port->open) {
dbg("%s - port not opened", __func__);
return -EINVAL;
return 0;
}
spin_lock_irqsave(&edge_port->ep_lock, flags);