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hso: Fix for 5 sec timeouts with v2.x firmware 

Don't send flow control settings to any port other than the modem port.
Older firmware ignored this request but did sent a reply. Newer firmware just
ignores it without reply and causes a 5 second timeout every time a port
(except for the modem port) is opened or if tiocm settings are changed.

Signed-off-by: Jan Dumon <j.dumon@option.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan Dumon 2010-01-05 04:52:42 +00:00 committed by David S. Miller
parent 68a351c501
commit 0e0367e980
1 changed files with 4 additions and 0 deletions
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4
drivers/net/usb/hso.c
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@ -1723,6 +1723,10 @@ static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
D1("no tty structures");
return -EINVAL;
}
if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
return -EINVAL;
if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
spin_lock_irqsave(&serial->serial_lock, flags);